Bonding, Structures, and Properties

Question 1

Isotope definition

Answer 1

different atoms of the same element that have the same number of protons but different numbers of neutrons

Question 2

formula for relative atomic mass

Answer 2

Ar = ((mass# x %) + (…) + (…)) / 100

Question 3

Element definition

Answer 3

a substance with only one type of atom in it

Question 4

Compound definition

Answer 4

two or more different elements chemically bonded/bound together

Question 5

Mixture definition

Answer 5

two or more types of atoms or molecules that are not chemically bonded/bound

Question 6

Structure of an atom

Answer 6

All neutral neutrons and positive protons are inside the nucleus and all negative electrons are arranged in shells around the nucleus

Question 7

Metallic bonding definition

Answer 7

the electrostatic attraction between electron cloud (or ‘sea’ of negative electrons) and positive metal nucli

Question 8

do metals conduct heat and electricity and why

Answer 8

metals are good conductors of heat and electricity because the delocalised negative electrons (ions) are free to move and carry a current

Question 9

are metals malleable and why

Answer 9

metals are malleable because their layers can slide over eachother

Question 10

ionic bonding definition

Answer 10

the electrostatic forces between positive metal ions and negative non-metal ions in a giant lattice structure

Question 11

covalent bonding definition

Answer 11

a covalent bond is a shared pair of electrons between two non-metals

Question 12

what is a positive ion

Answer 12

cation

Question 13

what is a negative ion

Answer 13

anion