chemistary paper 3and 4

Question 1

bonds

Answer 1

forces of attraction that hold atoms together

Question 2

ions

Answer 2

an atom with a posative or negative charge

Question 3

cations

Answer 3

metal atoms that have lost an electron to form a posative ion

Question 4

anions

Answer 4

non metal atom that gains electrons and form negative ions

Question 5

electrostatic forces

Answer 5

forces of attraction between all posativley and negativley charged electrons

Question 6

ionic compounds

Answer 6

formed by the loss and gain of electrons, these are held together by strong electrostatic forces

Question 7

lattice structure

Answer 7

‘billions’ of ions packed together in a regular repeted arrangement

Question 8

crystals

Answer 8

ionic compounds often form crystals when solid because of there regular lattice structure

Question 9

polyatomic ions

Answer 9

are groupd of two or more atoms which have become charged

Question 10

molecular

Answer 10

a substance held together by strong bonds called covailent bonds

Question 11

covailent bonds

Answer 11

a chemical bond that occurs when two non-metal atoms share a pair of electrons, usually from their outer shells.

Question 12

dot and cross diagram

Answer 12

how covalent bonds are formed

Question 13

compounds

Answer 13

contain an atom of more than one element

Question 14

monomers

Answer 14

small simple molecules that can be joined in a chain to form a polymer

Question 15

metals

Answer 15

groups one through three on the periodic table

Question 16

non metals

Answer 16

group four through eight on the periodic table