9 - atoms and IONS - April 5

What is the charge of an ion with 11 protons and 10 electrons?

How many valence electrons does a chlorine atom have?

• 5

• 6

• 7

• 8

Which of the following is a cation?

• An ion with more electrons than protons

• An ion with more protons than electrons

• An ion with equal number of protons and electrons

• An ion with a complete valence shell

What is the main goal for an atom when it forms a compound?

• To lose all of its electrons

• To gain more protons

• To achieve a full valence shell

• To become a noble gas

Which of the following statements about anions is true?

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• Anions are positively charged ions.

• Anions have more protons than electrons.

• Anions are negatively charged ions.

• Anions cannot form compounds.

How does the number of protons in an ion compare to the number of protons in a neutral atom of the same element?

• The number of protons is less in an ion.

• The number of protons is more in an ion.

• The number of protons is the same in both an ion and a neutral atom.

• The number of protons varies unpredictably in an ion.

What happens to an atom's valence shell when it becomes a cation?

• It gains electrons.

• It loses electrons.

• It gains protons.

• It remains unchanged.

Which of the following is a characteristic of compound formation?

• Only involves the transfer of protons.

• Involves the sharing or transfer of electrons.

• Only involves the sharing of protons.

• Does not involve electrons.

• 12

• 15

• 18

• 20

What is the maximum number of electrons that can occupy the first valence shell of an atom?

• 2

• 8

• 18

• 32