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AnnZ [28]
3 years ago
15

Which of the following must be the same for two isotopes of an element? A. The number of neutrons B. The atomic number C. The ma

ss D. The charge
Answer is The atomic number
Chemistry
2 answers:
ASHA 777 [7]3 years ago
8 0
B. The atomic number. This is because the atomic number is the same as the number of protons an element has, and the number of protons defines an element.
Lana71 [14]3 years ago
7 0

Answer: B. The atomic number

Explanation:

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Why do strong bonds exist between water molecules? They have nonpolar structure. They are held together by hydrogen bonds. The h
Zolol [24]

Answer:

They are held together by hydrogen bonds

Explanation:

Hydrogen bonds are special dipole-dipole attractions between polar molecules in which a hydrogen atom is directly joined to a highly electronegative atom(oxygen or nitorgen or fluorine).

Such molecules includes water, alkanoic acids, ammonia and amines.

A hydrogen nucleus has a high concentration of positive charge. The bond is actually an electrostatic attraction between the hydrogen atom of one molecule and the electronegative atom(O or N or F).

Hydrogen bonds are very effective in binding molecules into larger units. Most substances that joins with hydrogen bonds have a higher boiling point and lower volatility.

This is why we have a strong intermolecular bond between water molecules.

5 0
3 years ago
Question 1 of 10What does the second quantum number (1) describe?O A. Which sublevel the electron is inB. Which energy level is
scoundrel [369]

Explanation:

The second quantum number also called the orbital quantum number describes the type of orbital or shape of it.

Answer: D. The specific orbital within a sublevel.

7 0
10 months ago
Which one of these is NOT a sign of chemical change? *
Gekata [30.6K]
I think it’s light
Have fun :)
3 0
3 years ago
The cube has a mass of 72.9 g.<br><br> What is its density in g/cm3? <br><br> What substance is it?
sashaice [31]
If the cube is 3 cm on each side, then it has a volume of 27 cm^3 (3 x 3 x 3). Density is mass divided by volume, so its density is 72.9/27 = 2.7 g/cm^3. 

<span>Going by the density, the cube is made of Aluminium - density is a fairly unique quantity</span>
6 0
3 years ago
When electrons are added to the outermost shell of a carbon atom, it forms
jenyasd209 [6]
I believe it forms an anion that has a larger radius.
3 0
3 years ago
Read 2 more answers
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