BM1 Review - Chemical Formulas & Elements vs Compounds

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound or molecule.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements are chemically bonded together.

Front

How many atoms of Carbon (C) are in the formula CO(NH2)2?

Back

1

Front

How many atoms of Oxygen (O) are in the formula CO(NH2)2?

Back

1

Front

How many atoms of Nitrogen (N) are in the formula CO(NH2)2?

Back

2

Front

How many atoms of Hydrogen (H) are in the formula CO(NH2)2?

Back

4

Front

How many Oxygen atoms (O) are in a molecule of CO2?

Back

2

Front

How many Hydrogen atoms (H) are in a molecule of H2O?

Back

2

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.