Chemistry Review

Front

What is evidence of a chemical change?

Back

Bubbles forming is evidence of a chemical change.

Tags

NGSS.MS-PS1-2

Front

What are metals?

Back

A group of elements that are shiny and conduct heat and electricity well.

Front

What is the opposite phase of melting?

Back

Freezing is the opposite phase of melting.

Front

How many hydrogen atoms are in the chemical formula H2O?

Back

There are 2 hydrogen atoms in the chemical formula H2O.

Tags

NGSS.MS-PS1-1

Front

What are electrons?

Back

Electrons are negatively charged particles.

Tags

NGSS.MS-PS2-3

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances.

Front

What is the periodic table?

Back

A table that organizes all known elements by their atomic number and properties.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Tags

NGSS.MS-PS1-1

Front

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

Back

A physical change does not create a new substance, while a chemical change does.

Tags

NGSS.MS-PS1-4