Atomic Structure and Electronic Configuration

Elements in the same group all have the same number of...

• Electrons

• Protons

• Valence Electrons

• Energy Levels

What do the heights of the peaks represent in the mass spectrum?

• number of isotopes
• relative abundance of each isotope
• average atomic mass
• charge:mass ratio

What is the electronic configuration for Phosphorus atom ?

• 1s²2s²2p⁶3s²3p³

• 1s²2s²2p⁶3s²3p⁵

• 1s²2s²2p³

• 1s²2s²2p⁶3s²

Which of the following is the electronic configuration for Mg²⁺ ion?

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p²

• 1s² 2s² 2p⁶ 3s²

Which one of the following contains no unpaired electrons in the ground state?

• Be

• F

• Si

• N

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

An orbital can at most hold how many electrons?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass
• False - They do not have about the same mass

What is electron configuration?

• Electron configuration is the arrangement of electrons in an atom.

• Electron configuration is the process of converting electrons into protons.

• Electron configuration is the process of removing electrons from an atom.

• Electron configuration is the study of electron behavior in a magnetic field.

What is the electron configuration of a chlorine atom?

• 1s2 2s2 2p6 3s2 3p3

• 1s2 2s2 2p6 3s2 3p5

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p4