Chemistry- Chermical symbols

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NaHCO₃

From the formula above we see the following elements.
Na = sodium
H = hydrogen
C = carbon
O = oxygen

From the subscripts we see that one atom of each of sodium, hydrogen and carbonexist. Three atoms of oxygen exist as indicated by the subscript "3" next to the oxygen.

Elements and chemical symbols exercises

Complete the table below.

Element	Symbol
Potassium
Fluorine
	Au
	Na
Neon
Calcium
	Fe
	Mg
Boron

A compound has the formula NaOH. What are the elements that form this compound?

Complete the table below.

Formula of the compound	Elements present and the number of atoms of each.
C₁₂H₂₂O₁₁	12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms.
NaHCO₃	Solution
C₂H₅OH
Al₂O₃
NH₄SO₄
HNO₃	1 hydrogen atom, 1 nitrogen atom and 3 oxygen atoms
	2 hydrogen atoms, 1 sulfur atom and 4 oxygen atoms
	1 magnesium atom, 1 sulfur atom and 4 oxygen atoms.
	2 hydrogen atoms and 2 oxygen atoms
	1 calcium atom, 1 carbon atom and 3 oxygen atoms.