Bohr Models and Ions

Valence electrons determine

• The chemical properties of an atom

• The color of an atom

• The physical properties of an atom

• The mass of an atom

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Valence electrons are

• Electrons in an atom's innermost ring

• All of an atom's electrons

• Electrons in an atom's outermost ring

• Electrons that will be lost

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Where are the three particles of an atom located?

• Only protons are in the nucleus, electrons and neutrons are in the outer rings

• The electrons and neutron are in the nucleus; protons are in outer rings

• The proton and electron are in the nucleus; neutrons are in outer rings

• The proton and neutron are in the nucleus; electrons are in outer rings

What does the period number indicate about an element?

• How many valence electrons it has

• How many electron shells it uses

• How many total electrons it has

• How many total protons it has

What does the group number indicate about an element?

• How many total electrons it has

• How many total protons it has

• How many valence electrons it has

• How many electron shells it uses

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What is an ion?

• An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

• An uncharged atom

• Same as a noble gas

• Atom that has lost protons

How many electrons does an atom need to have in its outermost shell to be stable?

• 10

• 2

• 8

• 1

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Which group of elements has 1 valence electron and will result in an ionic charge of +1?

• Alkali Metals (Group 1)

• Halogens (Group 7)

• Noble Gasses (Group 8)

• Alkaline Earth Metals (Group 2)

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An electron has a charge of

• +1

• -1

• 0

• -2

The formula for calculating the atomic mass is

• protons + neutrons

• protons + electrons

• electrons + neutrons

• protons = neutrons