2.1.A.1 Electron Configurations

How many electrons can the d sublevel hold?

• 8
• 10
• 2
• 4

There are 4 different types of subshells s, p, d, f

• true
• false

Which electron configuration belongs to Chlorine (Cl)?

• 1s² 2s² 2p⁶ 3s² 3p⁵
• 1s² 2s² 2p⁶ 3s² 3p⁶
• 1s² 2s² 2p⁶ 3s² 3p⁷

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

Which of the following chemical species has the same electron configuration as an atom of argon, Ar?

• Mg²⁺

• Be²⁺

• O^2-

• Cl^-

What is meant by isolectronic?

• Group of atoms or ions have the same electronic configuration

• Group of atoms or ions have the same protonic configuration

• Group of atoms or ions have the same electrical properties

• Group of atoms or ions have the same electron charge

What is the example of species that are isolectronic?

• Na⁺ and Si⁴⁺

• Na⁺ and Cl^-

• Mg²⁺ and Al ⁺

• S^2- and O^2-

Which of the following pairs of ions are isoelectronic?

• Na⁺ and Cl^-

• Cl^- and Si^4-

• K⁺ and N^3-

• Ca²⁺ and Sc²⁺

Energy levels are denoted by:

• letters

• numbers

• a combination of letters and numbers

• subscripts