Elements and Compounds

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Tags

NGSS.MS-PS1-1

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.

Tags

NGSS.MS-PS1-1

Front

What is an element?

Back

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

Front

What is the smallest particle of matter that makes up an element?

Back

The smallest particle of matter that makes up an element is an atom.

Front

What is the significance of the Periodic Table?

Back

The Periodic Table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties.

Tags

NGSS.HS-PS1-1

Front

What distinguishes an element from a compound?

Back

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

Front

What is the atomic number of an element?

Back

The atomic number of an element is the number of protons in the nucleus of its atoms, which determines the element's identity.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be either of the same element or different elements.

Tags

NGSS.MS-PS1-1

Front

What is the difference between a physical change and a chemical change?

Back

A physical change affects the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances with different properties.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas, which differ in shape and volume.