Question

elements found in the universe are: a. carbon and nitrogen b. hydrogen and helium c. oxygen and sulphur d. hydrogen and carbon
triatomic molecule among the following is: a. ozone b. phosphorus c. sulphur d. carbon
Atoms combined to form: a. elements b. mixture c. compounds d. molecule

fill in the blanks :
1. metals are................of heat and electricity.
2.non metal are.................sonorous.
3.silicon is a......................
​

Answer 1

Answer:

1. b. hydrogen and helium

2. d. carbon

3. d. molecule

fill in the blanks :

1. good conductor

2. non

3. chemical element

Answer 2

Answer:

b. hydrogen and helium

a.ozone

d.molecule

1. conductors

2. not

3. metalloid