Question 3
if an atom has a charge of -2, which of the following must be true?
1. it has two more neutrons than electrons.
2. it has two more protons than electrons.
3. it has two more protons than neutrons.
4. it has two more electrons than protons.

It has two more electrons than protons.

Explanation:

The atoms acquires positive or negative charge and converted into ions. Positively charged species is known as cations and negatively charged species is known as anions.

The atoms contain equal number of proton and electron in the neutral atom. The elements acquire negative charge when the electrons are added in the atom. Here, the element has acquire negative charge it means it has gain two electrons. The element has two extra electrons than protons.

Thus, the correct answer is option (4).

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation: