Answer:
# of electron shells
Explanation:
Elements in the same periodic group have the same number of electron shells.
How is the number of electrons in an element determined?
The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
Answer:
By finding the number of protons
Explanation:
Keep in mind when trying to find the number of electrons of a element, the number of electrons also equals the number of protons. In order to find the number of protons in the element simply find it's atomic number.
Example:
Find the number of electrons in the element iron.
Fe (Iron)
Fe's atomic number is 26
Protons/electrons = 26
Hope this helps.
what compound has a formula of c5h12o and a broad ir peak at 3300 cm–1?
The compound is known as Pentanol.
Pentanol is an example of an Alcohol and has five carbon atoms present in
its structure. The formula for Pentanol is C₅H₁₂O, it has a straight chain and a
distinctive aroma.
Pentanol also has a broad IR peak of 3300cm⁻¹ which is referred to as the
wavelength in which it is absorbed during infrared spectroscopy.
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how do you solve this ?
1mol of K contains 6.022×10^23atoms
0.0246 mol contains:-
[tex]\\ \sf\longmapsto 0.0246\times Avagadro\:no[/tex]
[tex]\\ \sf\longmapsto 0.0246\times 6.022\times 10^{23}[/tex]
[tex]\\ \sf\longmapsto 1.37302\times 10^{22}[/tex]
choose any bases that will selectively deprotonate the above acid, that is, any bases that will favor the formation of products.
In order to deprotonate an acid, we must remove protons in order to achieve a more stable conjugate base. For this example, we can use the relationship between carboxylic acid and hydroxide.
Deprotonation is the removal of a proton from a specific type of acid in reaction to its coming into contact with a strong base. The compound formed from this reaction is known as the conjugate base of that acid. The opposite process is also possible and is when a proton is added to a special kind of base. This is a process referred to as protonation, which forms the conjugate acid of that base.
For the example we have chosen to give, the conjugate base is the carboxylate salt. This would be the compound formed by the deprotonated carboxylic acid. The base in question was strong enough to deprotonate the acid due to the greater stability offered as a conjugated base.
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F
1. For each statement, circle Tor F for True or False. In the blanks, write the number(s) of the SENTENCE(S) that
give the best evidence for your answer.
a. Rocks are classified by the minerals that create them.
b. Sedimentary rocks can never change form.
c. Metamorphic rocks form on the surface of Earth.
d. Only Igneous rocks can be turned into Metamorphic rocks.
52
Answer:
1:F,2:F,3:T,4:I don't really know
D
more than 80 s.
2.
A student carried out 2 experiments to investigate the rate at which gas was given
off when indigestion tablets were added to dilute hydrochloric acid.
She used her results to draw curves on a graph.
syringe
Experiment1
volume
of gas
(cm)
Experiment 2
tablet
50 cm acid
Experiment
Time/seconds
Experiment 2 could have been carried out
A
B
at a lower temperature
using more concentrated hydrochloric acid
using half an indigestion tablet
using a crushed tablet.
с
WILL MARK BRAINLIST IF RIGHT
What coefficient should be used for oxygen gas to correctly balance this equation
NO LINKS
Since 1:1:3 is the smallest ratio that can be used to balance the chemical equation using whole number coefficients, you can thus say that the oxygen molecule has a coefficient of 3 in the balanced chemical equation that describes the decomposition of magnesium chlorate.
Need Help! 20 Points!!!!!
Is fire a plasma or a gas?
Answer:
Most flames are made of hot gas, but some burn so hot they become plasma. The nature of a flame depends on what is being burnt. A candle flame will primarily be a mixture of hot gases (air and vaporised paraffin wax). The oxygen in the air reacts with the paraffin to produce heat, light and carbon dioxide.
Answer:
Fire is considered a plasma. Most people get fire confused with gas.
I hope this helped at all.
WILL GIVE BRAINLIEST !!!!
Answer:
NaI
Explanation:
Sodium has a charge of 1+ and iodine has a charge of 1-. They exist in a one-to-one ratio. Because they are ionic compounds, they go for the lowest ratio available.
There are _____________ elements, but only 92 occur naturally.
how many covalent bonds are usually formed by the element n?
Answer:
3
Explanation:
N stands for element Nitrogen (Refer to the attachment for Lewis dot structure)
what reagent is used to detect the presence of starch?
Answer:iodine solution
Explanation: it is because in the presece of starch iodine will turn blue/black
How can you increase the boiling point of water?
A. By increasing the volume of the water
B. By increasing the air pressure above the water
C. By lowering the air temperature above the water
ОО
D. By lowering the pressure of the water
Answer: B
Explanation:
You can increase the pressure above the boiling water.
The boiling point of a liquid varies depending upon the surrounding environmental pressure. A liquid in a partial vacuum has a lower boiling point than when that liquid is at atmospheric pressure. A liquid at high pressure has a higher boiling point than when that liquid is at atmospheric pressure.
Which action occurs at an electrode of a galvanic cell?(1 point) plz help
anion flow
anion transfer
electron flow
electron transfer
Answer:
i think ur answer would be this one electron flow
Explanation:
Can someone please explain me how to find charges for transition metals?
Answer:
You can determine the charge of a transition metal by looking at its anion (negatively charged ion) partner. For example, lets say you are given AuCl, and you are asked to find the charge of Au, which would be the transition metal in this case.
this what you want
A shampoo
B. chocolate chip cookie dough
C. tap water
D. air
2. Which of the following is a solution?
A concrete
B. sand and water
C. orange juice
D. apple juice
Answer: B) sand and water
Explanation:
because when you mix sand and water the sand does not dissolve in the water
Which statement would help determine if a cell is a plant or animal cell?
A. If the cell has a cell wall, it can be an animal cell.
B. If the cell has a nucleus, then it can only be an animal cell.
C. If the cell has a cell wall, it can be a plant cell.
D. If the cell has a nucleus, then it can only be a plant cell.
Answer:
C
Explanation:
Only plant cells have a plant wall
HELP FAST!! Two carbon atoms (Group 14) bond with two hydrogen atoms (Group 1) to form acetylene (C2H2). How would each carbon
atom in acetylene bond? (1 point)
Each carbon atom would share one pair of electrons with hydrogen and three pairs with the other carbon
atom
Each carbon atom would share one pair of electrons with the other carbon atom and three pairs with each
hydrogen atom
Each carbon atom would share one pair of electrons with the other carbon atom and two pairs with each
hydrogen atom
Each carbon atom would share one pair of electrons with hydrogen and one pair with the other carbon
atom
Answer: C
Explanation: Each carbon atom would share one pair of electrons with hydrogen and three pairs with the other carbon atom.
Each carbon atom would share one pair of electrons with hydrogen and three pairs with the other carbon atom Hence option A is correct.
What are electrons?Electrons are defined as a subatomic particle with a negative charge that makes up the nucleus of an atom along with protons and neutrons. Gravitation, electromagnetic interactions, weak interactions, electricity, magnetism, chemistry, and thermal conductivity are just a few of the physical processes that depend on electrons.
An atom of carbon has four electrons. It needs four electrons to become stable because that is its outermost shell. Three pairs of electrons are covalently bound between two carbon atoms to form acetylene, and the final pair is covalently joined to two hydrogen atoms.
Thus, each carbon atom would share one pair of electrons with hydrogen and three pairs with the other carbon atom Hence option A is correct.
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Bismuth-210 has a half life of 5.0 days if you had a sample of 60.00g of Bismuth-210 how much would be left after 15 days? (Show Your Work)
Answer:
7.5 gm left
Explanation:
Bismuth-210 has a half life of 5 days
15 days is 15/5 = 3 half lives
since half the amount is left in 5 days or 1 half life
(1/2) x (1/2) x (1/2) the staring amount would be left in
3 half lives. so 1/8 is left
(1/8) x 60.0 = 7.5 gm left
HELPP FILL THE BLANKS QUICK!!! I mark Brainly ’ Remember! Physical change:
Properties remain the______________________
.
_____________________are
.
_____ _________substances are formed.
In a chemical change, the___________
change and the result is__________(can’t go back)
______________New substances produced in a chemical reaction have different______________and
_______________
properties from the original substance.
When chemical bonds break, atoms rearrange, and new bonds form, a______________
has occurred.
When a chemical reaction occurs between two liquids that form a solid, a_____________
is formed.
Properties remain the same
In chemical change, the bonds change and the result is permanent. New substances produced in a chemical, reaction have different bonds and properties from the original substance.
When chemical bonds break..... a chemical change has occurred.
When a chemical reaction occurs between..... a physical change has occurred.
Give an example of a specialized cell.
Answer:
Muscle cell
Explanation:
An example of a specialized cell would be a muscle cell, which allows muscles to contract. A specialized cell has a specific function.
Answer: muscle cell
Explanation: muscle cell
Explain why an atom with an electron configuration of 1s2,2s2,2p6,3s2,3p3 has 3 valence electrons despite having 5 electrons in its third energy level.
Answer:
Silicon
Explanation:
A mixture of two gases with a total pressure of 2.06 atm contains 0.70 atm of Gas A. What is the partial pressure of Gas B in atm
Answer:
the object with lesser mass
Explanation:
its kinetic energy
in liquids, the attractive intermolecular forces are ________.
Answer:
the attractive forces between two molecules and strong enough to hold molecules relatively together
What two particles compose the nucleus of an atom? ___________________ and ______________________.
Answer:
protons and neutrons
Explanation:
An ionic compound consists of a ___________ and a _____________.
Answer:
Ions and charged particles
Explanation:
An ionic compound consists of a ions and a charged particles
Why do atoms want 8 valence electrons?
1) 8 valence electrons are a full shell that makes the atom more stable.
2) 8 valence electrons help atoms dissolve in water.
3) In nature, 8 is the number at which all matter is most happy.
4) 8 valence electrons make the atom better able to react with other elements.
Answer:
1) 8 valence electrons are a full shell that makes the atom more stable.
Explanation:
Due to the octet rule, atoms tend to form compounds in ways that give them eight valence electrons and thus give them the electron configuration of a noble gas, making them stable.
Precautions to be taken when is experimenting the boiling point of liquids
What evidence exists for a more recent increase in greenhouse gas concentrations in the atmosphere
Answer:
-data collected from Mauna Loa shows an increase in CO2 by 20% in the last 40 years
-ice core data shows links between CO2 and temperature, with a recent increase in both
-data from ice cores and other proxies show increases in CO2, CH4, and N2O since the Industrial Revolution
