Bonding in discrete molecules

Question 1

a discrete (simple) molecule is

Answer 1

an electrically neutral group of two or more atoms held together by chemical bonds

Question 2

covalent and polar covalent bonding in discrete molecules can be shown by

Answer 2

dot-and-cross diagrams

Question 3

when drawing dot-and-cross diagrams we draw the electrons in

Answer 3

the overlapping bit of the circles

Question 4

true or false: ‘in order for compounds to be stable, the outer shell of each atom must have the same number of electrons in the outer shell of a noble gas’

Answer 4

false, there are some exceptions, such as BeCl2, in which the central atom, beryllium, only has 4 outer electrons

Question 5

a displayed (full structural) formula shows each bonding pair of electrons as

Answer 5

a line drawn between the two atoms involved

Question 6

a double bond means that there are…pairs of electrons

Answer 6

two

Question 7

a triple bond means there are…pairs of electrons

Answer 7

three