How are ions formed?

A. by the disintegration of one or more electrons
B. by the sharing of one or more electrons between two atoms
C. by the transfer of one or more electrons from one atom to another
D. by the disintegration of one or more protons

Hey there!

Your answer is c. by the transfer of one or more electrons from one atom to another.

Ions can be positive or negative. Positive ions are called cations, and negative ions are called anions.

Electrons are transferred because two atoms have a large difference of electronegativity and the electrons are shared so unequally that the electrons are completely transferred from one atom to another, forming ions.

Hope this helps!

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

the correct answer is:

a. formation of precipitation