National 5 Important Notes

Question 1

what does the term relative atomic mass mean. why is it rarely a whole no.

Answer 1

it is an average mass of the isotopes , because it is nearer to the closest one

Question 2

put these in the order of the lowest to highest melting and boiling points
IONIC, COVALENT MOLECULE, COVALENT NETWORK, METALLIC

Answer 2

covalent molecule, metallic, ionic , covalent network

Question 3

order them if they conduct in solid or liquid

IONIC, COVALENT MOLECULE, COVALENT NETWORK, METALLIC

Answer 3

IONIC,- no, yes
COVALENT MOLECULE, - no,no
COVALENT NETWORK, - no, no
METALLIC- yes, yes