Unit 2 - Atomic Structure and Theory

Which particle has a positive charge?

• electron
• orbital
• proton
• neutron

Choose the particle that has no charge.

• nucleus
• neutron
• proton
• electron

Which particle determines the identity of the element?

• electron

• proton

• neutron

• valence shell

An electron has a _____ charge.

• negative
• positive
• neutral

Tags

NGSS.HS-PS2-4

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

Tags

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What is the name and mass number of an element with 8 protons, 8 electrons, and 8 neutrons?

• Carbon - 16

• Oxygen - 16

• Oxygen - 24

• Neon - 8

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

Tags

NGSS.MS-PS1-1

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.HS-PS1-1

If an atom has 12 positively charged subatomic particles, it must also have ______________, if the atom is neutral.

• 12 neutrons

• 12 electrons

• 12 protons

• 24 protons and neutrons

Which scientist discovered the electron, which helped him develop a model of the atom?

• Niels Bohr
• John Dalton
• Ernst Rutherford
• J.J Thompson