Definitions

Question 1

Relative atomic mass

Answer 1

is the weighted average mass of an atom of a given element compared to the unified atomic mass unit

Question 2

Unified atomic mass unit

Answer 2

1/12 of a carbon 12 isotope

Question 3

Relative isotopic mass

Answer 3

mass of a given isotope to 1 UAMU

Question 4

Relative Molecular mass

Answer 4

is weighted average of a molecule compared to the unified atomic mass unit

Question 5

Relative formula mass

Answer 5

is the weighted average mass of an ionic compound compared to the unified atomic mass unit

Question 6

Mole

Answer 6

it is the amount of substance that contains as many elementary particles as are in exactly 12 grams of the carbon-12 isotope

Question 7

E.F

Answer 7

gives us the simplest ratio in which atoms are combined e.g ch2

Question 8

M.F

Answer 8

gives us the actual number of atoms in each molecule

Question 9

anhydrous

Answer 9

does not contain water in it’s lattice

Question 10

hydrous

Answer 10

contains water in its lattice

Question 11

1st I.E

Answer 11

the Ionisation Energy (IE) of an element is the amount of energy required to remove one mole of electrons from one mole of gaseous atoms of an element to form one mole of gaseous ions

Question 12

ionic bonding

Answer 12

the electrostatic force of attraction between a pair of atoms that have an opposite charge

Question 13

electronegativity

Answer 13

is the tendancy that an atom has to withdraw electrons to itself