Unit 1 Practice Exam 2

Which of the following statements is true about group names in the periodic table?

• Group I is the alkaline earth metals

• Group III is the halogens

• Group VIII is the noble gases

• Group VII is the alkali metals

The size of an atomic orbital is determined by which quantum number?

• m₁

• l

• mₛ

• n

Which of the following descriptions of a quantum number is correct? I. The quantum number, n, is a shell and defines the energy and distance from the nucleus of an electron II. The quantum number, l, is a subshell and defines the shape of an orbital III. The quantum number, m₁, is an orbital and defines the orientation of the orbital

• I only

• I and II only

• I, II and III

• II and III only

In an atom, what would be the maximum number of electrons having the quantum numbers n = 3, l = 2 and m_s = -1/2?

• 18

• 10

• 5

• 0

Which set of quantum numbers does NOT provide a satisfactory solution to the wave equation?

• n = 2, l = 0, m_l = -1

• n = 1, l = 0, m_l = 0

• n = 4, l = 2, m_l = +2

• n = 5, l = 3, m_l = -3

Which of the following statements about the alkali metals is NOT true?

• They readily form singly charged cations

• Flame tests produce photons in the visible region of the electromagnetic spectrum.

• They have a single valence electron

• Hydrogen is an alkali metal

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Aufbau, Hund & Pauli Theory: One of the following does NOT represent the ground state electron configuration for an atom. Which one?

• [Ne] 3s2 3p5

• [Ne] 3s1 3p3

• [Ne] 3s1

• [Ne] 3s2

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NGSS.HS-PS1-1

Paul’s rule is the reason:

• There are a maximum of two electrons in an orbital

• Electrons do not pair in subshells until all orbitals have at least one electron

• That electrons can behave as particles and waves

• None of the above.

Which of the following atoms has an s2p3 valence electron configuration?

• Ga

• Ge

• As

• Se

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Which of the following is the valence electronic structure for a halogen?

• ns2 np5

• ns1

• ns2 np6

• ns2 nd10

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NGSS.HS-PS1-1

NGSS.HS-PS1-2