.n.

it's very easy

I don't think I was here that day when they teached it

NaHCO has 4 elements, not 6

Fixed it

C2H5OH = 3 elements, 9 atoms

oh

Mg(OH)3 = 3 elements, 7 atoms

what grade are you in?-

9th

Ah- okay

Count the UPPERCASE letters. That’s how many elements you have. The number on the bottom matches to the last uppercase letters and tells you how many of that one there is. If the last uppercase is in parentheses, it applies to all uppercase letters in the parentheses

Ohhh okay thanks
That was a big help

e

is there an english translation?

H2O = 2 hydrogen, 1 oxygen
NO = 1 nitrogen, 1 oxygen
C6H12O6 = 6 carbon, 12 hydrogen, 6 oxygen

Mg(OH)3 is 5 number of atoms

The letters represent the elements
The numbers represent the amount of those element’s atoms are in it

ty