MCQ 11 MarkWhich noble gas has only two electrons in its valence shell?ARadonBKryptonCNeon✓HeliumAnswerCorrect option: D. HeliumDView full question & answer→
MCQ 21 MarkA group of two or more non-metals which has a negative charge on it is called :Aion✓complex ionCradicalDnone of theseAnswerCorrect option: B. complex ionBView full question & answer→
MCQ 31 MarkFerrous and Ferric ions have valency :A+1 and +2 respectively✓+2 and +3 respectivelyC-2 and -3 respectivelyD+1 and +3 respectivelyAnswerCorrect option: B. +2 and +3 respectivelyBView full question & answer→
MCQ 41 MarkProtons and neutrons in the nucleus of an atom are called :✓nucleonsBnuclear particlesCcharged particlesDmass particlesAnswerCorrect option: A. nucleonsAView full question & answer→
MCQ 51 MarkSodium ion is formed :✓by the donation of one electron from its outermost shellBby the acceptance of one electron in its outermost shellCby the acceptance of one proton in its nucleusDby the donation of one proton from its nucleusAnswerCorrect option: A. by the donation of one electron from its outermost shellAView full question & answer→