Pre-Quiz Chapter 2

Choose the element that is the least reactive

• Fluoride

• Argon

• Sulfur

• Boron

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NGSS.HS-PS1-1

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The atomic number is the number of

• Protons

• Electrons

• Neutrons

• Protons and neutrons

What makes up the mass number?

• protons

• electrons

• protons and neutrons

• protons and electron

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NGSS.HS-PS1-8

Atoms of the same element that differ in the number of neutrons?

• Enzymes

• Isotopes

• Protons

• ions

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NGSS.HS-PS1-8

Found in the nucleus, have a +1 charge, and mass of 1

• Proton

• Neutron

• Electron

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Found in the nucleus, have a 0 charge, and mass of 1

• Protons

• Neutrons

• Electrons

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NGSS.HS-PS1-8

Found outside of the nucleus, have a -1 charge, and a mass of 0.

• Protons

• Electrons

• Neutrons

What is the makeup of isotope ⁵H?

• 2 protons, 3 neutrons

• 1 proton, 4 neutrons

• 3 protons, 2 neutrons

• 4 protons, 1 neutron

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NGSS.HS-PS1-8

Which of the following is not true about electron configurations?

• If an atom has only one shell, it is complete with two electrons.

• If an atom has two or more shells, the octect rule applies.

• Atoms with more than eight electrons in the outer shell react by gaining electrons

• Atoms with eight electrons in the outer shell are not reactive

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NGSS.HS-PS1-1

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How many electrons are in the first valence electron shell?

• 1

• 8

• 2

• 3