Atomic Structure and Periodic Table

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

• 14
• 7
• 15
• 18

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NGSS.HS-PS1-1

Protons and Electrons balance the charge of an atom.

• True
• False

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

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NGSS.MS-PS1-1

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20
• 10
• 5
• 25

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NGSS.MS-PS1-1

Which scientist conducted experiments using alpha particles and thin gold foil, which later helped him develop his model for the atom? 

• Ernest Rutherford
• Kneels Bore
• Niels Bohr
• Earnest Rutherfraud

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NGSS.HS-PS1-8

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

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

An isotope has three forms.  30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu.  Average atomic mass will be closest to

• 2 amu
• 3 amu
• 4 amu
• 5 amu

Describe an Electron Cloud?

• the mist outside of an atom
• home of the protons
• where electrons are located
• nucleus

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NGSS.MS-PS1-1

The subatomic particle that determines the identity of an element.

• neutron
• proton
• electron
• outer shell

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.HS-PS1-8