Question

could anyone give me some information about the first 20 elements in the periodic table it's urgent I have to submit this assignment to my chemistry teacher two days later pleaseee ☺️​

Answer 1

Answer:

About hydrogen :

• Hydrogen is a nonmetallic, colorless gas under ordinary conditions. It becomes an alkali metal under extreme pressure.

Atomic Number: 1

Symbol: H

Atomic Mass: 1.008

Electron Configuration: 1s1

Group: group 1, s-block, nonmetal

Answer 2

Answer:

hope it's help

it is only 18 elements