Counting Atoms

Front

How many Hydrogen atoms are in 3(NH₄)₂CrO₄?

Back

24

Front

Calculate the number of Oxygen atoms in Al(OH)₃.

Back

3

Front

What is a pure substance that cannot be broken down into simpler substances?

Back

Element

Front

If there is no subscript, how many atoms of that element are there?

Back

1

Front

How many Chlorine (Cl) atoms are on the right side of the equation?

Back

1

Front

What is the definition of 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 does a subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

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

How many atoms are in a single molecule of water (H₂O)?

Back

3 (2 Hydrogen and 1 Oxygen)