What kind of bond with form between (options: ionic, polar covalent, non polar covalent or metallic)
1) phosphorus and chlorine
2) potassium and oxygen
3) fluorine and fluorine
4) copper and aluminum
5) carbon and fluorine
6) carbon and hydrogen
7) aluminum and oxygen
8) silver and copper

1) phosphorus and chlorine

type of bond =  polar covalent

They share their electrons and due to difference in electronegativities the form polar covalent bond.

2) potassium and oxygen

type of bond = ionic

Due to high difference in electronegativities the form ionic bond.

3) fluorine and fluorine

type of bond = non polar covalent

They share their electrons and due to same electronegativities the form non polar covalent bond.

4) copper and aluminum

type of bond = metallic

copper and aluminum  make metallic bond like other metals and mostly helpful in making alloys.

5) carbon and fluorine

type of bond = polar covalent

They share their electrons and due to difference in electronegativities the form polar covalent bond.

6) carbon and hydrogen

type of bond = polar covalent

They share their electrons and due to difference in electronegativities the form polar covalent bond.

7) aluminum and oxygen

type of bond = ionic

Due to high difference in electronegativities the form ionic bond.

8) silver and copper

type of bond = metallic

silver and copper  make metallic bond like other metals and mostly helpful in making alloys.

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.