A_20 Counting Atoms Practice

Front

What is the total number of atoms in H₂O?

Back

3 (2 Hydrogen + 1 Oxygen)

Front

How many elements are in the compound NaHCO₃?

Back

4 (Sodium, Hydrogen, Carbon, Oxygen)

Front

How many elements are present in hydrochloric acid (HCl)?

Back

2 (Hydrogen and Chlorine)

Front

How many elements are in C₈H₁₀N₄O₂?

Back

4 (Carbon, Hydrogen, Nitrogen, Oxygen)

Front

What is the total number of atoms in C₆H₁₂O₆?

Back

24 (6 Carbon + 12 Hydrogen + 6 Oxygen)

Front

Define an atom.

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is a molecule?

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.

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the chemical formula for water?

Back

H₂O