Elements, Molecules and Compounds

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. For example, NaCl (table salt) is a compound made of sodium and chlorine.

Tags

NGSS.MS-PS1-1

Front

Which of the following is a compound: NaCl, O2, Hydrogen, He2?

Back

NaCl is a compound.

Tags

NGSS.MS-PS1-1

Front

What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means. Examples include Oxygen, Nitrogen, and Calcium.

Front

What do we call a substance consisting of a single atom?

Back

An element.

Front

What is the chemical formula for table sugar?

Back

C6H12O6.

Front

Is table sugar (C6H12O6) an element or a compound?

Back

Table sugar is a compound.

Tags

NGSS.MS-PS1-1

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. Molecules can be made of the same or different elements.

Tags

NGSS.MS-PS1-1

Front

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

Back

There are 2 atoms of oxygen in carbon dioxide.

Tags

NGSS.MS-PS1-1

Front

What is the difference between an element and a compound?

Back

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

Front

What is the chemical symbol for Oxygen?

Back

O.