UHS MDCAT 2024 Chemistry#Atomic Structure#Electronic Configuration656Choose the best answerElectronic configuration of chromium is:A[Ar] 3d⁴ 4s²B[Ar] 3d⁵ 4s²C[Ar] 3d⁵ 4s¹D[Ar] 3d⁶ 4s² Like 0 Discuss 0Share
Atomic StructureDegenerate Orbitals657Choose the best answerIn the absence of an external electric or magnetic field, which pair of orbitals is degenerate?A2s and 3sB3dxy and 3dxzC3s and 3pD3p and 4p Like 0 Discuss 0Share
S & P Block ElementsGroup 2 Reactions with Water658Choose the best answerWhich statement correctly describes the reactions of Group 2 metals with water?ABe reacts vigorously with cold water, whereas Mg does not.BBe is unreactive, Mg reacts mainly with steam, while Ca, Sr and Ba react more readily.CAll Group 2 metals react equally with cold water.DOnly Be and Mg liberate H₂ from water. Like 0 Discuss 0Share
Periodic TableIsoelectronic Species and Ionic Radius659Choose the best answerWhy is the ionic radius of S²⁻ larger than that of K⁺?AS²⁻ contains more electrons than K⁺.BK⁺ contains more occupied electron shells.CS²⁻ and K⁺ are isoelectronic, but S²⁻ has a lower nuclear charge.DS²⁻ has a higher nuclear charge than K⁺. Like 0 Discuss 0Share
Chemical BondingHybridization and Sigma Bond Strength660Choose the best answerWhich overlap generally produces the strongest σ bond among the following?Asp³–sp³Bsp–spCsp²–sp²DAll are equally strong Like 0 Discuss 0Share