Each atom/element has an electron configuration
The electron configuration shows the energy level of the electron
Each electron configuration has 4 quantum numbers, namely n, l, ml, and ms
n = the principall = the angular momentum / azimuthal ml = the magnetic ms = the electron-spinWe make an example of the element Mg which is in group 2 with the atomic number 12
Electron configuration of Mg: [Ne] 3s² or 1s² 2s² 2p⁶ 3s²
if Mg removes 2 electrons then Mg will form a positive ion (cation) Mg²⁺
This cation is included in the monatomic ion because it is formed from one element (in contrast to the polyatomic ion, which is formed from two or more elements such as SO₄²⁻, ClO₃⁻)
Electron configuration of Mg²⁺ : 1s² 2s² 2p⁶
So atoms can be positively or negatively charged depending on removing or attracting electrons
plz help for braniliest
Answer: i think b.
Explanation:
Why is the reactivity of metal increase but that of non-metal decreases as we go down in a group of periodic table? (pls its important i need this question's ans for my exam so answer it fast thank you)
Answer:
Nonmetal reactivity decreases down a group because the nucleus' ability to gain more valence electrons weakens due to more nuclear shielding. For Metals: the most reactive metals are those that can lose their valence electrons the most easily. ... Francium is the most reactive metal
Explanation:
Answer:
While moving from top to bottom in a group of the periodic table, the reactivity of non- metals decreases. ... Thus, the tendency of gaining electron/s in the valence shell decreases as well as the chemical reactivity also decreases on moving from top to bottom in a group of non- metals.
Heat capacity of a material is dependent upon the material's mass.
True or false?
Hello
Answer:
True.This quantity is known as the specific heat capacity (or simply, the specific heat), which is the heat capacity per unit mass of a material. Experiments show that the transferred heat depends on three factors:
(1) The change in temperature,
(2) the mass of the system.
(3) the substance and phase of the substance.
1)The thermostat on your hot water heater is raised 2 degrees celcius. If your hot water heater holds 400,000g of water, how much heat energy is used up to heat the tank?
2) The temperature of 50g of water was raised to 60c by the addition of 1.5 kJ of heat energy. What was the initial temperature of the water?
3) How much heat is released when 23.00g of water vapor condenses in a cloud to form raindrops?
4) How many joules of heat energy did the sun provide, of a 150 g patch of ice is melted
Explanation:
7erhsigusiskjkurfnkldowustehwoostfsjsozdtshalsoxttensiuxdnslc icy rbkedlxt
When an extended structure is dissolved in water, it releases potassium (K) and chlorine (Cl) atoms in the
water
Which statement correctly describes the nature of this substance?
A.It is made of K and Cl atoms.
B.It is made of K molecules and Cl atoms.
C.It is made of K atoms and Cl molecules.
D.It is made of KCl molecules
Answer:
A.It is made of K and Cl atoms.
Explanation:
An atom is the smallest indivisible unit of an element while a molecule is the smallest particle of an element/compound that retains its chemical properties. However, the molecule is two or more atoms held together by means of a chemical bond e.g. Cl2 molecule consists of two atoms of Chlorine.
Hence, if an extended structure dissolves in water to release pottasium (K) and Chlorine (Cl) atoms, it means it is made up of K and Cl atoms. This is because the substance will dissociate l, in the presence of water, into it's simplest form which is the atomic level.
TRUE or FALSE: Any measurement that has been cubed is volume.
Answer:
True
Explanation:
Volume is measured in "cubic" units. The volume of a figure is the number of cubes required to fill it completely, like blocks in a box. Volume of a cube = side times side times side. Since each side of a square is the same, it can simply be the length of one side cubed.
Patrick did an experiment to study the solubility of two substances. He poured 100 mL of water at 20 °C into each of two beakers labeled A and B. He put 60 g of Substance A in the beaker labeled A and 60 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.
Experimental Observations
Substance Mass of Undissolved Substance at Different Temperatures (gram)
20 ° 40 ° 60 ° 80 °
A 18 14 10 5
B 60 60 60 60
Part 1: Which, if any, substance is soluble in water?
Part 2: Explain how the data helped you determine solubility for both substances for temperatures 20 °C to 80 °C.
Answer:
1. SUBSTANCE A IS SOLUBLE IN WATER WHILE SUBSTANCE B IS INSOLUBLE IN WATER.
Looking at the information given in the question about the two substance, you will discover that 60 g of both substances were initially put in the beaker. While the mass of undissolved substance for substance A is variable, that of substance B remain constant at 60 g, this shows that the substance is not soluble in water.
2. Looking at the two substances given in the question, you will observe that for substance A, the degree of solubility in water decreases as the temperature of the water increases. For instance, at 20 degree Celsius, the mass of undissolved substance is 5 and as the temperature increases to 40, 60 and 80 degree Celsius, the mass of undissolved substances also increase to 10, 14 and 18 respectively. This shows that, the higher the temperature, the less of the substance will dissolve. For substance B, the mass of undissolved substance remain constant at all temperatures, which shows that the substance is insoluble in water. Thus, the data given helps to determine the solubility of the substance by giving the amount of substances that are insoluble at each temperature.
Explanation:
Please can i have help on these two multiple choice questions.I’ll be so grateful!!!
Answer:
1(neutrons) 2(protons)
Explanation:
what state of matter of a substance depends on how the particles in that substance
Answer:
Solids is the answer hope this helps
Match each tool on the left with its most likely use on the right by choosing the correct number. ruler scale telescope thermometer microscope 1. Measuring the weight of an apple 2. Studying a distant object 3. Studying a very small object 4. Measuring the length of a book 5. Measuring the temperature of a cup of tea
Answer:
1. Measuring the weight of an apple- scale.
2. Studying a distant object- telescope.
3. Studying a very small object- microscope.
4. Measuring the length of a book- ruler.
5. Measuring the temperature of a cup of tea- thermometer.
Explanation:
1. A scale or measuring scale is used to measure or take the weight of any object. It can be either an analog or digital scale as long as the measurements can be taken from it. So, measuring the weight of an apple can be done on a measuring scale.
2. A telescope is an instrument that is used in scientific, especially in space explorations, to study a distant object in the universe/ sky. It gives a clear image and enables a person to view things closer than they are. So, a telescope can be used to study distant objects.
3. A microscope is used to study very different small objects, such as microbes and other organisms. It enlarges the objects to be viewed and thus, enables them to be studied in detail.
4. A ruler may be used to measure the length of a book. It has indications or marks by which the lengths can be taken.
5. A thermometer is an instrument that is used to measure the temperature of anything, be it a person or even other things such as food and even a cup of tea.
Answer:
Match each tool on the left with its most likely use on the right by choosing the correct number.
4
ruler
1
scale
2
telescope
5
thermometer
3
microscope
Explanation:
The east-west Schism resulted from a power struggle between the emperor and whom?
PLEASE HELP IM BEING TIMED
A:the pope
B:priests
C:bishops
D:The patriarch
Answer:
I'm pretty sure it is the patriarch
Explanation
Patriarch means the head of a family or tribe.
Answer:
D
Explanation:
What is the relationship between the kinetic energy of molecules in a solid and a liquid? Justify your response in two or
more complete sentences.
LEDE
Answer:
In solid the molecules are soo close so tht cant move and also have bonds but in liquid molecules are far and move so thats y liquid don has its own shape
Answer:
In solid the molecules are soo close so tht cant move and also have bonds but in liquid molecules are far and move so thats y liquid don has its own shape
Explanation:
Chloroplasts and mitochondria are both involved in energy conversion in cells.Select the other similarities they share. Choose ALL
that apply
Answer: The Answer is A,B And E
Explanation:
The similarities between mitochondria and chloroplast in plants include, they both contains DNA and ribosomes and both are surrounded by double membranes.
What is mitochondria?Mitochondria is an organelle found in cells of plants and animals. It is know as the power source of cell since it delivers the chemical energy for cell. Chloroplasts are special organelles found in plants. They contains thylakoids which are used in photosynthesis. Chloroplasts are not found in animal cells.
Both mitochondria and chloroplast are surrounded by an inner membrane and outer membrane. They contains their own DNA inside. Both are involved in energy conversion but the mechanism differs.
Both chloroplast and mitochondria contains ribosomes. Hence, options A, B and E are correct.
To find more on mitochondria, refer here:
https://brainly.com/question/18540744
#SPJ2
what are 3 examples of pairs of atoms with polar covalent bonds?
Answer:
Water - H2O
Ammonia - NH3
Sulfur dioxide - SO2
Hydrogen sulfide - H2S
Ethanol - C2H6O
Explanation:
Those are some atoms with polar covalent bonds. Hope this helps!!
How does water move from the hydrosphere to the atmosphere?
O A. Precipitation
B. Percolation
O C. Evaporation
D. Condensation
the number of atoms in 2.0 moles of B is
Answer:
The answer is
1.204 × 10²⁴ atoms of BExplanation:
To find the number of entities of a substance given it's number of moles we use the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
n = 2.0 moles
We have
N = 2 × 6.02 × 10²³
We have the final answer as
1.204 × 10²⁴ atoms of BHope this helps you
Number of moles of boron (B) = 2
To Find :We have to find number of atoms present in the given amount of boron[tex].[/tex]
Solution :➤ We know that 1 mole of substance contains 6.022×10²³ particles (atoms/molecules).
Avogadro's no. = 6.022 × 10²³★ Number of atoms present in B :
⭆ N = n × [tex]\sf{N_A}[/tex]
N denotes number of atomsn denotes mole number[tex]\sf{N_A}[/tex] denotes avogadro's number⭆ N = 2 × 6.022 × 10²³
⭆ N = 12.044 × 10²³
⭆ N = 1.2 × 10²⁴
Hope It Helps!A Solution is a mixture of two or more substances_____
O a in water
O b. seperate from one another
O c in the same phase
Od come to room temperature
Answer:
In the same phase
Explanation:
Because when you make a solution you have to keep them in the same phase or you will oof.
(Plz help ASAP) List at least three different sources used for naming organisms
Answer:
kingdom, phylum, class, order, family, genus and species.
Explanation:
Find the answers to the Blanks in each box and give an explanation, use the formulas shown to answer this.
Answer:
yes find the blanks of formulas ATM is equals to 2152 came that is also is a 1 ATM is that can come so much of money in that close to 52 ke and 22 4l
Which of the following is a unit for acceleration?
A) m/s
B) m/s2
C) s/m 2
D) s/m
Explain the concept: Law of Multiple Proportions.
Answer:
The Law of Multiple Proportions explain that when two elements from a series of compounds, (replacing the two elements as A and B), the ratios of the masses of the second element that combine with 1 gram of the first element can always be reduced.
The answer the other guy gave is incorrect, and plagiarized.
My answer came from a lesson I learned.
Explain in steps how to find volume of a rock that is not rectangular water displacement
i need some help only answer if you are 100% sure
Answer:
poles
Explanation:
1. The answer to the research question is the...
A. Claim
B. Evidence
C. Reasoning
2.The scientific data used to prove your point is the...
A. Claim
B. Evidence
C. Reasoning
Answer:
1. A claim
2. B evidence
how many pounds are in 14.8 grams
Answer:
0.03262841
I tried, hope this helps :)
Answer:
0.032 lbs
Explanation:
Divide the mass value by 454.
30 Points!! 15 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answer: 22: C
23: A
24: A
25: D
26: B
Explanation: I hope that this helped :)
Answer:
22) b. stainless steel.
23) c. they are all substances.
24) b. a compound can only be separated into its components by chemical means.
25) a. substances are compounds, mixtures are not.
26) b. capitalized
extra: not 100 percent sure of 25
What is the correct order of these items from smallest to largest radius? Group of answer choices
Na+ < F- < O2-
Na+ < O2- < F-
O2- < F- < Na+
O2- < Na+ < F-
I'm assuming you're talking about atomic radius. It'd be the 2nd.
Fluoride has the smallest (group 17)
Oxygen has the 2nd smallest (group 16)
Sodium has the largest (group 1)
Sorry it took so long, didn't know it was multiple choice :)
Which ion is found in all acids
An acid is a chemical that, when added to water, releases hydrogen (H+) ions. The ion is found in all acids is H⁺ ion. Therefore, option B is correct.
What is an acid ?A Brnsted-Lowry acid or Lewis acid is a molecule or ion that has the ability to donate a proton or establish a covalent bond with an electron pair.
An acid is a chemical that, when added to water, releases hydrogen (H+) ions. A hydrogen ion is made up solely of a proton. The formulations for many acids may all be found to contain at least one H, such as hydrochloric acid.
The word "acid," which refers to the sour flavor and pungent odor of numerous acids, derives from the Latin word acidus, which meaning "sour." Examples: Because acetic acid and water are diluted, vinegar has a sour flavor.
Thus, option B is correct.
To learn more about an acid, follow the link;
https://brainly.com/question/14072179
#SPJ6
At point A, the beginning of observations, the substance exists in a solid state. Material in this phase has _________________ volume and _________________ shape. With each passing minute, _________________ is added to the substance. This causes the molecules of the substance to _________________ more rapidly which we detect by a ________________ rise in the substance. At point B, the temperature of the substance is __________°C. The solid begins to ________________. At point C, the substance is completely _______________ or in a _______________ state. Material in this phase has _________________ volume and ________________ shape. The energy put to the substance between minutes 5 and 9 was used to convert the substance from a __________________ to a _________________. This heat energy is called the latent heat of fusion. (An interesting fact.)
Between 9 and 13 minutes, the added energy increases the ____________________ of the substance. During the time from point D to point E, the liquid is ____________________. By point E, the substance is completely in the ________________ phase. Material in this phase has __________________ volume and ___________________ shape. The energy put to the substance between minutes 13 and 18 converted the substance from a _______________ to a _______________ state. This heat energy is called the latent heat of vaporization. (An interesting fact.) Beyond point E, the substance is still in the ___________________ phase, but the molecules are moving _____________________ as indicated by the increasing temperature.
Substance
Melting point
Boiling point
Bolognium
20 °C
100 °C
Unobtainium
40 °C
140 °C
Foosium
70 °C
140 °C
Which of these three substances was likely used in this phase change experiment?
Answer:
At point A, the beginning of observations, the substance exists in a solid state. Material in this phase has _____fixed____________ volume and ______________fixed___ shape. With each passing minute, ______________heat___ is added to the substance. This causes the molecules of the substance to _____collide____________ more rapidly which we detect by a ______temperature__________ rise in the substance. At point B, the temperature of the substance is __________°C. The solid begins to ______melt__________. At point C, the substance is completely ______liquid_________ or in a _______________ state. Material in this phase has _______fixed__________ volume and ______no definite______ shape. The energy put to the substance between minutes 5 and 9 was used to convert the substance from a ________solid__________ to a __________liquid_______. This heat energy is called the latent heat of fusion. (An interesting fact.)
Answer:
At point A, the beginning of observations, the substance exists in a solid state. Material in this phase has _____fixed____________ volume and ______________fixed___ shape. With each passing minute, ______________heat___ is added to the substance. This causes the molecules of the substance to _____collide____________ more rapidly which we detect by a ______temperature__________ rise in the substance. At point B, the temperature of the substance is __________°C. The solid begins to ______melt__________. At point C, the substance is completely ______liquid_________ or in a _______________ state. Material in this phase has _______fixed__________ volume and ______no definite______ shape. The energy put to the substance between minutes 5 and 9 was used to convert the substance from a ________solid__________ to a __________liquid_______. This heat energy is called the latent heat of fusion. (An interesting fact.)
Explanation:
The mass of an oxygen–18 atom is 18.0042 amu. Compute the calculated mass.
Answer:
The calculated mass of one atom of oxygen-18 is approximately 2.99×10⁻²³ grams
Explanation:
The given mass of an oxygen-18 atom = 18.0042 amu
The definition of the atomic mass unit is the mass equivalent to the mass of one twelfth the atomic mass of one atom of carbon-12. The atomic mass unit is used to express the mass of an isotope of an element
1 amu = 1.66 × 10⁻²⁴ grams
Therefore;
18.0042 amu = 18.0042 × 1.66 × 10⁻²⁴ grams ≈ 2.99×10⁻²³ grams
The calculated mass of one atom of oxygen-18 ≈ 2.99×10⁻²³ grams
The atomic mass unit can be taken as the mass in grams of one mole of the substance
Therefore, the mass of one mole of the oxygen 18 atom = 18.0042 g
