Bonds

Question 1

Molecules

Answer 1

Atoms bonded together. Mass = individual atoms mass added together.

Question 2

Bonds

Answer 2

Holds atoms together. Bonds are held together by valence electrons.

Question 3

Ionic bond

Answer 3

Metals and non-metals – two ions are held together by their opposite charges.

Question 4

Octet rule

Answer 4

Atoms are happy (strongest bond) when there are 8 electrons in there outer shell (valence).

Question 5

Covalent bonds

Answer 5

Two non-metals – the atoms share the electrons.

Question 6

Hydrogen bond

Answer 6

Weak bonds that are a result of polar molecules, where the electrons are pulled away from the hydrogen atoms. Net charge on each side of molecule.

Question 7

Metal bond

Answer 7

Metallic atoms – share their electrons; special class of covalent bonds. Electrons are a cloud or sea. Metals are malleable (bendable, flexible) because electron cloud can move around. Metals conduct sound and electricity well, because of the electron cloud.

Question 8

Carbon

Answer 8

Has 4 valence electrons – it almost always forms a covalent bond.

Question 9

Hydrocarbons

Answer 9

Saturated (alkanes) – C_nH_2n+2

Unsaturated (alkenes) – C_nH_2n-2

Question 10

Electronegativity

Answer 10

How much (how badly) an atom wants more electrons.