1
Q
why are they useful?
A
chemical reactions
2
Q
properties of nometal?
A
dull
brittle
do not conduct heat and electricity well
low melting and boiling points
3
Q
use of sulfur
A
make rubber hard
4
Q
use of oxygen
A
in hospital for breathing of patients
5
Q
use of helium? why?
A
balloons
lighter than air
6
Q
use of chlorine
A
kill bacteria
7
Q
use of carbon
A
purify water
8
Q
use of silicon
A
make computer chip
