Atomic Structure Quiz

What is the atomic number of an element?

• The atomic number of an element is the number of electrons in the nucleus of an atom.

• The atomic number of an element is the number of neutrons in the nucleus of an atom.

• The atomic number of an element is the number of isotopes in the nucleus of an atom.

• The atomic number of an element is the number of protons in the nucleus of an atom.

How is the atomic number of an element determined?

• By the number of protons in the nucleus of its atom

• By the number of isotopes in the nucleus of its atom

• By the number of electrons in the nucleus of its atom

• By the number of neutrons in the nucleus of its atom

What is the electron configuration of an atom?

• The electron configuration of an atom is the distribution of electrons in the atomic orbitals of the atom.

• The electron configuration of an atom is the size of the atom

• The electron configuration of an atom is the color of the atom

• The electron configuration of an atom is the number of protons in the nucleus

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How many electrons can occupy the first energy level?

• 8

• 2

• 5

• 10

What is the charge of a proton?

• +1

• 0

• -1

• 2

What is the mass of a proton?

• 2.67 x 10^-27 kg

• 1.67 x 10^-27 kg

• 1.67 x 10^-28 kg

• 1.67 x 10^-26 kg

What is the role of neutrons in an atom?

• Causing the atom to become radioactive

• Creating chemical reactions within the atom

• Stabilizing the nucleus and adding mass to the atom

• Contributing to the atom's electrical charge

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How do neutrons differ from protons?

• Neutrons have a positive charge, while protons have a negative charge.

• Neutrons have a negative charge, while protons have a positive charge.

• Neutrons have the same charge as protons.

• Neutrons have no charge, while protons have a positive charge.

What are valence electrons?

• Electrons in the nucleus of an atom

• Electrons in the middle shell of an atom

• Electrons in the innermost shell of an atom

• Electrons in the outermost shell of an atom involved in chemical bonding

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Why are valence electrons important in chemical reactions?

• Valence electrons are important because they determine the reactivity and chemical properties of an element.

• Valence electrons are important because they determine the size of an element.

• Valence electrons are important because they control the temperature of an element.

• Valence electrons are important because they determine the color of an element.

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