Question

chemical formula of 20 element

Answer 1

H -hydrogen
he-helium
li-lithium
be-beryllium
b-boron
C- carbon
n-nitrogen
O- oxygen
f- flourine
Ne -neon
na-sodium
m-magnesium
al-alumiun
si-silicon
p-phosphorus
s-sulfur
cl-chlorine
ar-argon
k-potassium
ca-calcium