Answer: B:
Explanation:
This is the most reasonable answer
the answer to this is D) They are all the same size
isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.
Hope This Helped
Answer:
A. 2 sig figs
Explanation:
In the number 0.0034, the zeros are called leading zeros. The only function of leading zeros is to fix the decimal point. Leading zeros are not counted as significant figures.
Answer:
proton and electrons orbit close together around a center nucleus
