Question

starting 30 elements​

Answer 1

Answer:

Hydrogen.........Oxygen

Explanation:

Answer 2

Answer:

Explanation:

Hydrogen

H

Helium

He

Lithium

Li

Beryllium

Be

Boron

B

Carbon

C

Nitrogen

N

Oxygen

O

Fluorine

F

Neon

Ne

Sodium

Na

Magnesium

Mg

Aluminum

Al

Silicon

Si

Phosphorus

P

Sulfur

S

Chlorine

Cl

Argon

Ar

Potassium

K

Calcium

Ca

Scandium

Sc

Titanium

Ti

Vanadium

V

Chromium

Cr

Manganese

Mn

Iron

Fe

Cobalt

Co

Nickel

Ni

Copper

Cu

Zinc

Zn