8th Grade Science Unit 1 Review

All matter is made of what

• energy

• atoms

• electrons

• compounds

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NGSS.MS-PS1-1

The positive particles of an atom are

• electrons

• positrons

• neutrons

• protons

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The central region of an atom where its neutrons and protons are is its

• nucleus

• electron cloud

• core

• center

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An atom with atomic number 6 would have how many protons

• 6

• 12

• 3

• cannot be determined

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NGSS.MS-PS1-1

Particles in an atom that are neutral and have no charge are

• negatrons

• electrons

• neutrons

• protons

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True or False: Neutrons have a negative charge

• True

• False

What is the atomic number for an element with 3 protons?

• 2

• 1

• 3

• 6

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NGSS.MS-PS1-1

A particle that moves around the nucleus is a(n)...

• Proton

• Neutron

• Electron

• Quark

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In the modern periodic table, elements are arranged by:

• atomic mass

• atomic number

• valence electrons

• number of isotopes

What does the 1.00794 stand for?

• Hydrogen

• atomic number

• atomic mass

• atomic explosion

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NGSS.MS-PS1-1