Extension: Elements and Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

How many elements are in the compound C2H8O?

Back

3 (Carbon, Hydrogen, and Oxygen)

Front

What elements make up H2SO4?

Back

2 Hydrogen, 1 Sulfur, 4 Oxygen

Front

How many chlorine atoms are in MgCl2?

Back

2

Front

What is the chemical formula for glucose?

Back

C6H12O6

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

How many atoms of oxygen are in carbon dioxide (CO2)?

Back

2

Front

What is the difference between an element and a compound?

Back

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

Front

What is the chemical formula for water?

Back

H2O (2 Hydrogen atoms and 1 Oxygen atom)