CBB - Introduction to Atoms

True or False: Atoms are made of smaller particles called protons, neutrons, and electrons.

• True That

• False

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NGSS.MS-PS1-1

The positively charged particle in the nucleus of an atom is the

• electron.

• neutron.

• proton.

The particle in the nucleus of an atom with no electrical charge is called the

• proton.

• neutron.

• electron.

The particle with a negative electrical charge that moves around the nucleus is the

• neutron.

• proton.

• electron.

• Megatron.

The number of protons in the nucleus of any atom is called the

• atomic number.

• proton number.

• positive number.

• atomic mass.

Most atoms are electrically ___________ because they have the same number of protons and electrons.

• negative

• positive

• neutral

Tags

NGSS.MS-PS1-1

The mass of an atom is in the nucleus. The number of protons plus the number of neutrons equals the

• atomic mass.

• atomic number.

• atomic weight.

Atoms of the same element (like iron) always have the same number of protons. But atoms with a different number of neutrons are called

• deviations.

• variants.

• isotopes.

A diagram, a mental picture, or object that represents something too small, large, distant, or dangerous to directly observe.

• a chart

• a graph

• a display

• a model

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NGSS.MS-PS1-1

NGSS.MS-ESS1-1

NGSS.MS-LS1-2

Scientists have developed models of atoms because they are too

• small to see.

• far away to see.

• large to see.

Tags

NGSS.MS-PS1-1