Chemical and Physical Properties

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity, such as state of matter, color, or density.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to undergo a specific chemical change, such as reactivity with acid or flammability.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

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 chemically bond together.

Front

What is a chemical change?

Back

A process that involves the transformation of one or more substances into new substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or boiling.

Front

How many atoms of an element are present if there is no subscript in a chemical formula?

Back

There is only 1 atom of that element.

Front

What is the formula for calculating the number of atoms in a compound?

Back

Count the subscripts in the chemical formula; if there is no subscript, it is assumed to be 1.

Tags

NGSS.MS-PS1-1

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the significance of the state of matter in physical properties?

Back

The state of matter (solid, liquid, gas) affects how substances behave and interact with each other.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke, is an example of a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5