551. Which one has maximum number of unpaired electrons ?
A. 6X
B. 7Y
C. 9Z
D. 13W
552. Molecular orbitals are filled according to _________________?
A. Auf bau principle
B. Hunds rule
C. Paulis Exclusion principle
D. All these
553. Which one shows high %age of the ionic character ?
A. H2O
B. HF
C. HCI
D. HBr
554. Which of the following have their outer most shell complete in atomic form ?
A. Noble gases
B. Alkali metals
C. Coinage metals
D. Gun metals
555. energy of atom in compound is___________________?
EA. Higher than individual
B. Lesser than individual
C. No change
D. Impossible to predict
556. An atom loses or gains electrons to__________________?
A. Gain stability
B. Form a bond
C. Complete its outermost shell
D. all are accurate justifications
557. In a group ionic radius ?
A. Increases
B. Decreases
C. No change
D. Variable trend
558. Ionization energy in a period generally ___________________?
A. Increases
B. Decreases
C. No change
D. Variable trend
559. Elements having high I.P values are____________________?
A. Metals
B. Non metals
C. Liquids
D. Solids
560. In a period electronegativity from left to right_________________?
A. Increases
B. Decreases
C. Remain constant
D. Variable trend