Lithium has the electron arrangement 2,1. When lithium forms an ion,
what will its electron arrangement be? 2,2
2
2,8
2,8,2

when lithium forms an ion it donates 1 electron

which makes its electron configuration to become 2

the answer is c. nacl

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.