B. False
Stability is determined by the ratio of neutrons and protons. Electrons are not in nucleus.
Answer:
E. a small yellow ball that represents the Sun
Explanation:
key word on the question, 'physical'
The answer to this problem is quite simple, it’s 9
The mass of magnesium in
atoms is 240 g.
Answer: Option A
<u>Explanation:</u>
First, we have to convert the atoms to moles of magnesium.
We know that
atoms are present in 1 mole of magnesium. So,


Thus,


Thus, 240 g of Magnesium is present in
atoms.