structure and bonding in first 20 elements

Question 1

examples of
metallic solid
monatomic gas
covalent networks
discrete covalent molecular gas
discrete covalent molecular solid

Answer 1

sodium
helium
carbon
oxygen 
silicon

Question 2

what is metallic bonding

Answer 2

positive metal ions surrounded by delocalised electrons high bp/mp

Question 3

what is covalent molecular

Answer 3

two atoms joined by covalent bonding

have ldf bonds

Question 4

what is
intramolecular bonds
intermolecular bonds

Answer 4

binds within the molecule

forces between the molecules

Question 5

what is covalent networks

Answer 5

many atoms joined together by covalent bonds
high bp/mp
bonds must be broken for the solid to melt

Question 6

covalent network-carbon diamond

Answer 6

4 bonds of carbon atoms
no delocalised electrons
can’t conduct electricity

Question 7

covalent network-carbon graphite

Answer 7

fourth outer electron becomes delocalised, can conduct electricity between layers good lubricant

Question 8

monatomic elements

Answer 8

not bonded
held by ldf
low bp/mp

Question 9

what does it mean if an atom has a higher bp/mp than another

Answer 9

it requires more energy to overcome
talk about bonds
how many electrons