Question

what is the chemical formula for barium and silicon?
what is the chemical formula for lithuim and sulfur?
chemical formula aluminum and selentium?
Pottasium and flourine?
Berylium and nitrogen?

Answer 1

While doing this, you need to make sure your charges=0
Ba=+2, silicon= -4
Ba2Si

Li=+1 S= -2
Li2S

K=+1 F=-1
KF

Be=+2 N=-3
Be3N2

Answer 2

1) Ba2Si

2)Li2S

3)KF

4)Be3N2