Chemistry Chapter 7 Lesson 1: Ions - Questions

What are valence electrons?

• Electrons in the highest occupied energy level of an element's atoms

• Electrons in the lowest energy level of an element's atoms

• Electrons that are not involved in chemical bonding

• Electrons that are found in the nucleus of an atom

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What largely determines the chemical properties of an element?

• The number of protons

• The number of valence electrons

• The number of neutrons

• The atomic mass

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How can you determine the number of valence electrons in an atom of a representative element?

• By looking at its atomic mass.

• By looking at its group number.

• By looking at its period number.

• By looking at its electron configuration.

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How many valence electrons do atoms of Group 1A elements have?

• One

• Two

• Four

• Eight

Which group do carbon and silicon belong to, and how many valence electrons do they have?

• Group 1A, one valence electron

• Group 4A, four valence electrons

• Group 8A, eight valence electrons

• Group 2A, two valence electrons

What is the exception to the group-number rule for noble gases?

• Helium has two valence electrons

• Helium has eight valence electrons

• All noble gases have four valence electrons

• All noble gases have six valence electrons

What are valence electrons usually involved in?

• Chemical bonds

• Nuclear reactions

• Magnetic fields

• Thermal conduction

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What do electron dot structures show?

• Valence electrons as dots

• Protons as circles

• Neutrons as squares

• Atomic mass as numbers

Which element in Group 6A has the electron dot structure with six dots?

• C

• O

• F

• Ne

How many electron dots does a Group 4A element in Period 3 have?

• 1

• 2

• 3

• 4