Quiz Electronic Configuration & Classification of Element

The X³⁺ ion has proton number of 26. Choose the correct electron configuration for X³⁺ ion. (The letter X³⁺ is not the actual symbol of the ion)

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸

Choose the correct electron configurations represents an atom that forms a simple ion with a charge of -2.

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷ 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁴

• 1s² 2s² 2p⁶ 3s²

The element M is in Period 4 and forms M²⁺ ion with six electrons in 3d orbital. Choose the correct statement about the M and M²⁺ ion. (The letter M & M²⁺ are not the actual symbol of the element and ion respectively)

• M has six valence electrons.

• M²⁺ ion is more stable than M³⁺ ion.

• M has four unpaired electrons.

• M²⁺ has 26 electrons

The element Q have four electrons in s- orbitals and four electrons in p-orbitals. Choose the correct statement about Q. (The letter Q is not the actual symbol of the element)

• Q is an element of Group 6

• Q can formed Q²⁺ ion

• Q has four valence electrons

• Q exist as a diatomic element

The element G has two electrons in first energy level, eight electrons in second energy level, 13 electrons in third energy level and one electrons in fourth energy level. Choose the correct statement about G. (The letter G is not the actual symbol of the element)

• G is s-block element.

• G formed G³⁺ ion by removing three electrons from d-orbital

• G has six unpaired electrons.

• The highest electrons in atom G has set quantum n = 3, l = 2, m_l = 2

The ion contains paired electrons in 3d orbitals is __________

• Ti²⁺

• Co⁴⁺

• Fe³⁺

• Cu⁺

The electron configurations of the Group 15 element has the electrons in the highest sublevel energy_________

• 3p³

• 4s² 3d³

• 2p⁵

• 3d⁵

The ion Z^2- has the same electron configuration as the noble gas, neon. Choose the incorrect statement about Z. (The letter Z^2- and Z are not the actual symbol of the ion and element respectively)

• Z is a Period 2 element

• Z is a block p element

• Z has no unpaired electrons

• Z exists as a diatomic element.

The element R maybe removed two electrons or three electrons from valence shells to form R²⁺ and R³⁺ ions respectively. R²⁺ ion has 24 electrons. Choose the incorrect statement about R and its ion. (The letter R, R²⁺ and R³⁺ are not the actual symbol of the element and ions)

• R²⁺ ion is more stable than R³⁺

• R is in Group 8

• R and R²⁺ have same number of unpaired electrons

• The first two electrons removed from R are from the fourth energy level.

The highest electron in atom J has the quantum number n = 3, l = 1, m_l = -1. Choose the incorrect statement about J. (The letter J is not the actual symbol of the element)

• J has 13 protons

• J can form J⁺ ion

• J p-block element

• J is a metal