Counting Atoms - Reassessment Practice

Front

What is the correct formula for three hydrogen (H), one sulfur (S), and four oxygen (O)?

Back

H₃SO₄

Front

How many atoms are there TOTAL in H₂SO₄?

Back

7

Front

What is a subscript in a chemical formula?

Back

A small number below an element symbol that tells the number of atoms of that element.

Front

How many atoms of Hydrogen are in H₂SO₄?

Back

2

Front

How many Chlorine atoms are in MgCl₂?

Back

2

Front

What does the subscript '2' in H₂O represent?

Back

It indicates there are 2 hydrogen atoms.

Front

What is the total number of atoms in the compound CaCO₃?

Back

5 (1 Calcium, 1 Carbon, 3 Oxygen)

Front

What is the formula for a compound made of 1 nitrogen (N) and 3 hydrogen (H) atoms?

Back

NH₃ (Ammonia)

Front

What does the term 'molecule' refer to in chemistry?

Back

A group of two or more atoms bonded together.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded.