How do ionic bods form
1) atoms of metallic elements give up electrons to atoms of nonmetallic elements
2) atoms of nonmetallic elements give up electrons to atoms of metallic elements
3) atoms of metallic elements accept electrons form atoms of nonmetallic elements

1) atoms of metallic elements give up electrons to atoms of nonmetallic elements

Explanation:

A classic example of an ionic bond is NaCl, or table salt.

In their ionic forms, Na+ and Cl-, Cl has 7 valence electrons and Na has 1. According to the octet rule, they will try to get 8 electrons in their valence shell.

Makes sense for Na (a metal) to give up its one electron to Cl (a nonmetal), so Cl will have 8 electrons in its valence shell! This is what happens during ionic bonding.