Periodic TablePeriod 3 Trends46Choose the best answerAll the following trends are observed across Period 3 from left to right EXCEPT a gradual:AIncrease in melting pointBChange in oxides from basic toward acidicCChange in bonding character from mainly ionic toward covalentDDecrease in atomic radius with nearly constant shielding Like 0 Discuss 0Share
Periodic TableShielding Effect and d-Block Contraction47Choose the best answerAn element containing completely filled inner d-orbitals may have a smaller atomic radius than expected because d-electrons:AIncrease the number of valence electronsBShield the nuclear charge poorlyCCompletely cancel nuclear attractionDStrongly shield the outer electrons Like 0 Discuss 0Share
Periodic TableIonization Energy Trend48Choose the best answerWhich is the correct increasing order of first ionization energy in Period 2?ALi < B < Be < C < O < N < F < NeBLi < Be < B < C < N < O < F < NeCLi < B < Be < O < C < N < F < NeDB < Li < Be < C < O < N < Ne < F Like 0 Discuss 0Share
Periodic TableIonization Energy Trend49Choose the best answerGallium has a slightly higher first ionization energy than aluminium mainly because of:APoor shielding by the intervening 3d-electronsBGreater shielding by 4p-electronsCLower nuclear charge of galliumDA completely filled valence shell Like 0 Discuss 0Share
Periodic TableGroup 13 Ionization Energy Trend50Choose the best answerThe correct decreasing order of first ionization energy among Group 13 elements is:AB > Tl > Ga > Al > InBB > Ga > Tl > Al > InCTl > B > Ga > In > AlDB > Al > Ga > In > Tl Like 0 Discuss 0Share