The atom that is made up of two protons is He. The number of neutrons is also two. The number of electrons matters in the charge. So to make 10 electrons, we add 8 more. hence, 4/2 He 8-.
I hope this answers helps it’s D
The most common species of nitrogen in which its oxidation state is zero is the diatomic nitrogen (

). This is because the oxidation number of pure elements (whether alone as an atom or combined with other atoms of the same element such as the diatomic nitrogen) is always zero.
In addition to diatomic nitrogen, there are diazonium (

) compounds where nitrogen has an oxidation number of zero.
The answer is 2) 4.7 g/mL because the solid use 17 mL and 80g/17mL is 4,7 g/mL.
Answer:
54 electrons
Explanation:
I(iodine) has 7 electrons on the last level, so it can take 1 more electrons.
I- also shows that 1 additional electron was added. (I^-1)
I (iodine) has 53 electrons.
So, I- will have 54 electrons.