Explain this to me,please! I have a science test soon!?

Question

Explain:

1-the transfer of electrons
2-formation of ions
3-formation of ionic bonds
4-ionizing energy

thank you for your time.. I just really suck at science and I need your help...

Answer 1

1) Electrons are transferred if the energy supplied or obtained is favourable.

2) When atoms or molecules lose or gain electrons.

3) When two ions come close enough but overlap of orbitals is negligible.

4) Energy required to remove one or many electrons.