Question

1st 20 elements in chemistry​

Answer 1

Answer:

hydrogen helium lithium beryllium boron carbon nitrogen Oxygen fluorine neon sodium magnesium aluminium silicon Phosphorus Sulphur chloride argon

Answer 2

Answer:

Explanation:

In First 20 elements,  

Metals are :

Lithium,

Beryllium,  

Sodium,

Magnesium,

Aluminum,

Potassium,

and Calcium.

Non-metals are :

Hydrogen,

Helium,

Carbon,  

Nitrogen,  

Oxygen,  

Fluorine,

Neon,

Phosphorus,

Sulfur,  

Chlorine,

and Argon.

Metalloids are :  

Boron

and Silicon.

Properties of metals :

1.Metals react with nonmetals to form ionic bonds.

2.Metals are a good conductor of electricity

3. Metals have high melting points and high boiling points.

4.Metals are lustrous.

5.Metals are hard.

 

Physical Properties of non-metals ;

1.Nonmetals have high ionization energies.

2.Electronegative in nature.

3.Poor conductors of electricity. ETC,

Thanks!