The Periodic Table

A substance that cannot be decomposed into simpler substances by ordinary chemical processes is __________.

• a molecule

• a cell

• an element

• a compound

Each element has a ______________ used by chemists around the world as a kind of shorthand.

• symbol

• picture

• graph

• color

The number of protons in an element is known as the _______________________.

• atomic name

• atomic category

• atomic score

• atomic number

Electrons in atoms collect in layers called ______around the nucleus.

• shells

• straws

• springs

• envelopes

The element _________ has the symbol Au.

• Aluminum

• Oxygen

• Silver

• Gold

The arrangement of chemical elements started with ______________________.

• Henry Moseley

• Dmitri Mendeleev

• Robert Periodic

• Marie Curie

The first periodic table was ordered by _______________ and had many gaps.

• atomic number

• atomic weight

• state of matter

• density

Families of elements on the periodic table are determined by _________________.

• state of matter

• number of neutrons

• unfilled electron shells

• color of the element

The science of _________________ is the study of matter and the chemical changes that matter undergoes.

• biology

• physics

• geology

• chemistry

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The columns of the periodic table are called ________________.

• cousins

• groups

• friends

• periods