Chemistry

Front

What is a pure substance made of two or more elements chemically combined in a set ratio?

Back

Compound

Front

What is matter?

Back

Anything that takes up space and has mass.

Front

On the Periodic Table, each element increases by one _________.

Back

Proton

Front

Who developed the modern day periodic table of elements?

Back

Mendeleev

Front

What is the octet rule? How many valence electrons can the first three periods hold?

Back

2, 8, 8

Tags

NGSS.HS-PS1-1

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically combined.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Tags

NGSS.MS-PS1-1

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5