ELECTRON CONFIGURATION AND MAGNETIC PROPERTY OF AN ATOM

It is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. Answer in UPPERCASE.

(a)  

What is the maximum allowable number of electrons that a d subshell can hold?

• 2

• 6

• 10

• 14

The electron configuration of an atom is 1s² 2s² 2p⁶ 3s² 3p⁶. The atomic number of this atom is (a)   .

Answer the numerical value only, do not spell.

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NGSS.HS-PS1-1

What is the electron configuration of Scandium, ₂₁Sc?

(a)  

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NGSS.HS-PS1-1

How many unpaired electrons are in phosphorus atom? The electron configuration is:

1s² 2s² 2p⁶ 3s² 3p^3.

(a)  

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NGSS.HS-PS1-1

"Every orbital in a sublevel is singly occupied before any pairing is done."

• Aufbau Principle

• Pauli's Exclusion Principle

• Hund's Rule of Maximum Multiplicity

"Electrons fill atomic orbitals of the lowest available energy levels before occupying orbital with higher energy levels."

• Aufbau/Building Up Principle

• Pauli's Exclusion Principle

• Hund's Rule of Multiplicity

Which of the following electron configurations dictates that an atom is diamagnetic?

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁴

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are in a potassium atom, ₁₉K?

(a)  

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NGSS.HS-PS1-1

The condensed electron configuration of a substance is [Ar] 4s² 3d¹⁰.

• The unknown substance can easily be attracted into a magnetic field created by a strong magnet.

• The substance can easily be repelled by a magnetic field created by a strong magnet.

• The substance is a noble gas --- it is not affected by the magnetic field.

• Insufficient data.

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NGSS.HS-PS1-1