Answer:
D atoms of the same element which have different numbers of neutrons
Explanation:
Isotopy is the existence of two or more atoms of the same element having the same atomic number but difference mass number due to differences in the number of neutrons in their various nuclei.
These atoms are called isotopes Isotopes of an element have the same electronic configuration. They have the same chemical properties but only differ in their masses due to the difference in the number of neutrons.can you help please??
Answer:
no
Explanation:
Answer:
The answer is B
which process is a form of mechanical weathering?
A. carbonation
B. wedging
C. hydrolysis
D. oxidation
Answer:
Ethier a or c
Explanation:
Question 4 (1 point)
How much energy is needed to melt 15.4 grams of water at 0 degrees Celsius? (AHrus-334 J/g)
b
21.7)
5.1)
5.1 kJ
21.7 kJ
с
d
PLEASE HELP!! WILL GIVE BRAINLIEST!!!!
A student was using the periodic table to organize elements based on their ionization energy from lowest to highest. At the end of the class period, the student left one of the 4 spaces blank. It looked like this:
Barium (Ba), Cobalt (Co), ______, Helium (He)
There are 4 options to fill in the blank: Antimony (Sb), Krypton (Kr), Selenium (Se), or Nitrogen (N). Which element is the correct one to fill in the blank? Explain why using the following words: ionization energy, attractive force, energy levels, distance, and protons.
Answer:
Barium (Ba), Cobalt (Co) ,Copper (Co),Helium (He)
is it Copper (Co)?
How many atoms are there in 2.43 g of calcium?
Answer:
Explanation:
We're asked to calculate the number of atoms of
Ca
in
153
g Ca
.
What we must first do is convert the given mass of calcium to moles of calcium, using its molar mass (referring to a periodic table, this is
40.08
g
mol
):
153
g Ca
(
1
mol Ca
40.08
g Ca
)
=
3.82
mol Ca
Using Avogadro's number,
6.022
×
10
23
particles
mol
, we can calculate the number of atoms present:
3.82
mol Ca
(
6.022
×
10
23
atoms Ca
1
mol Ca
)
=
2.30
×
10
24
atoms Ca
The rock was white and black speckled with a density of 2.6 g/mL. Physical or chemical property?
Answer:
Chemical
Explanation:
What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?
Selenium atom
A. Se6+
B. Se2+
C. Se6-
D. Se2-
Answer:
Explanation:
D. Se2−
Selenium is in Group 16 of the periodic table, and it typically has 6 valence electrons. To achieve a stable set of valence electrons, it will either try to gain two more electrons to form Se²⁻or lose six electrons to form Se⁶⁺. Therefore, the correct option is option D.
An ion is an atom or a molecule that has gained or lost one or more electrons, resulting in an unequal number of protons and electrons. When an atom gains electrons, it becomes negatively charged and is called an anion. Conversely, when an atom loses electrons, it becomes positively charged and is called a cation.
Ions play a crucial role in chemical reactions and the formation of chemical compounds, as they are attracted to one another based on their opposite charges. This process helps stabilize the electron configuration and achieve a more stable, lower-energy state.
Thus, the ideal selection is option D.
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what evidence lead rutherford to propose that the atom had a nucleus?
Answer:
When he shot radiation through gold foil, some of the radiation shot back, some went directly through, and some slight angled off.
Explanation:
He knew that the radiation that had gone all the way through had not hit anything.
He knew that the radiation that came directly back must have hit a big nucleus.
He knew that the radiation that angled slightly off must have hit a smaller, orbiting particle (electrons).
What are the similarities and differences in slurries, sols, pastes and gels?
I actually do not know the answer can I help tommorow if you are fine with it tooo sleeeepy have 14 exams tommorow have to prepare.
Sorry:(
Is the rate of decay fastest at the beginning, middle, or end of the process?
Answer:
The beginning
Explanation:
In a nuclear reaction, the rate of decay is fastest at the beginning of the process.
What are nuclear reactions?There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
Learn more about nuclear reactions,here:
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How are the pressure and temperature of a gas related
Answer:
The pressure of a given amount of gas is directly proportional to its absolute temperature, provided that the volume does not change (Amontons's law). ... The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).
Answer:
pressure is directly proportional to temperature at constant volume
Choose one of Rutherford’s discoveries and explain why it intrigues you. If it doesn’t intrigue you, make it up. Give me one paragraph for this (5 sentences).
Answer:
i am pooop but stink fart
Explanation:
Which is the role of the gall bladder? PLEASE HURRY I WILL MARK YOU BRAINLYEST
A:to provide physical digestion
B:to stored the liquid produce by the liver
C: to make the liquid that is stored in the liver
D: to decrease the chemical digestion
Answer:
The gallbladder is a pear-shaped, hollow structure located under the liver and on the right side of the abdomen. Its primary function is to store and concentrate bile, a yellow-brown digestive enzyme produced by the liver. The gallbladder is part of the biliary tract
Answer:
a.............................
why is the chemical reaction between nitric acid and sodium hydroxide called a neutralization reaction?
Answer:
Because nitric acid is acidic in nature and sodium hydroxide is basic in nature so when acid and base react they become neutral.
If the half-life of Uranium-235 is 176000 years and 12.5 g of Uranium-235 remain after 704000 years, how much of the radioactive isotope was in the original sample.
Please help on number 6 will mark as brainliest
Answer:
Oil- nonpolar
Sugar- polar
Salt- Polar
Dish soap- It is both polar and nonpolar
Explanation:
a) so they will remain separate from molecules of a polar solvent such as water
b) Sugars are polar due to their -OH groups, and dissolve readily in water by forming many hydrogen bonds.
c)At the molecular level, salt dissolves in water due to electrical charges and due to the fact that both water and salt.
d) Soap molecules have both properties of non-polar and polar at opposite ends of the molecule.
Select the arrow that would accurately diagram this thermal energy transfer.
Hot Cold
Question 5 options:
←
↺
→
↻
Answer:
I thing the accurately diagram is =>
Answer:
→
Explanation:
i took the test
the diagram below represents a portion of a cell membrane. The arrow indicates that the cell membrane is carrying out the process of...
Answer:
I'm feeling nice today so heres the answer
Explanation:
In the portion of the cell membrane shown in the diagram, the arrow indicates the process of active transport.
Explanation:
Active transport is one of the mechanisms of transmembrane transport, which involves the use of energy. The diagram (see image) shows the hydrogen (H⁺) output from the cytoplasm to the extracellular space, through an H⁺ pump —consuming ATP— which represents an active transport process.
The hydrophobic nature of the cell membrane prevents the free passage of hydrosoluble elements or ions, as H⁺, so they require the use of active transport to pass through it.
The other options presented are not correct, because
Respiration is a process that occurs in the mitochondria.
Diffusion is a passive transport process that does not require energy.
Cellular recognition depends on membrane proteins that act as specific receptors.
Answer:the answer is active transport
Explanation:
What does the notation tt mean to geneticists? *
Why are noble gases called "safe" gases?
Answer:
Noble gases are called "safe" gases because they are inert.
General Formulas and Concepts:
Reading a Periodic TableChemical Properties of Noble GasesExplanation:
Because Noble Gases have filled their outer shell electrons fully, they tend not to form compounds with other elements or react with others to produce another compound.
Take Ne (neon) for instance. It's electron configuration is 1s²2s²2p⁶. The outer most shell is the 2p sublevel, and according quantum numbers, the 2p sublevel only has 3 spaces for 2 electrons each that it can hold. Therefore, Ne has a full outer shell and no electron spots to create a bond with other elements.
Why does the human eye see different colors?
Answer:
The human eye and brain together translate light into color. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. ... Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors
Explanation:
i have advancedddd
an_____is a trait that a organism inherits that makes it more suited to it's natural envormemt, helping it survive
adaptation may be i guess
Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g). How much hydrogen chloride was used in the reaction
We have that for the Question,it can be said that How much hydrogen chloride was used in the reaction is
x=74.42From the question we are told
Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g).
How much hydrogen chloride was used in the reactionHow much hydrogen chloride was used in the reactionGenerally the equation for the Reaction is is mathematically given as
Mg+2HCl-----MgCl2+H2
Grams of MgCl2=[tex]\frac{96.9*24.30}{2.04}\\[/tex]
Grams of MgCl2=1154.25g
Therefore
ON cK -12
How much hydrogen chloride was used in the reaction is
x=74.42
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Bromine has a higher ionization energy than chlorine
True or False
Answer:
Chlorine
Explanation:
Since chlorine is above bromine in the periodic table, following the trends of ionization energy in the periodic, the further up you go the more energy is required to ionize an atom.
Heeeeelppppp! Serious answers only
Please :(
Answer:
1. A
2. C
Explanation:
Answer:
there are 3 elements in question 1 and 4 atoms in question 2
Explanation:
I am new I am 7 my big brother told me to get this
Answer:
cool! Welcome. On this app we help people who need help with schoolwork.
In this unbalanced chemical equation, which element is not conserved?
3LIOH + H3PO4 Li PO4 + 3H20
A. O
B. H
C. P
D. LI
Answer:
LI
Explanation:
There is three Li in the start but One Li after
What is the formal charge of carbon in CO?
|C≡O|
Answer:
FC of C = -1
General Formulas and Concepts:
Lewis Dot StructuresResonance StructuresFormal Charge: FC = # of valence e⁻ - # of lone e⁻ - # of bondsExplanation:
Step 1: Define
Carbon (C)
4 valence e⁻2 lone e⁻3 bondsOxygen (O)
6 valence e⁻2 lone e⁻3 bondsStep 2: FC of C
Substitute: FC = 4e⁻ - 2e⁻ - 3Subtract: FC = -1Why are city streets so vital to the functioning of a city, as well as the people living within it?
What holds the two parts of a metal together?
S
E
A
Answer: The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (The Electron Sea Model.
Explanation: I hope that helped!
