Isotopic, Isobaric and Isoneutronic

21.	The following are isotonic groups –
	A. ₆C¹² , ₇N¹⁴, ₈O¹⁶
	B. ₆C¹² , ₇N¹⁴, ₈O¹⁸
	C. ₆C¹² , ₇N¹⁵, ₈O¹⁶
	D. ₆C¹⁴ , ₇N¹⁵, ₈O¹⁶ Option”D” is correct

22.	₃Li⁷ and ₄Be⁸ are –
	A. isotope
	B. isobar
	C. isotone
	D. isomer Option”C” is correct

23.	₁₅P³¹ and ₁₄Si³º are –
	A. isotopes
	B. burdensome
	C. isoelectronic
	D. sumneutronic Option”D” is correct

24.	Ions that have the same number of electrons are called
	A. isotopes
	B. burdensome
	C. isoelectronic
	D. sumneutronic Option”C” is correct

25.	With what is AI³⁺ isoelectronic?
	A. CI
	B. AI
	C. S¯¯
	D. F¯ Option”D” is correct

26.	Which of the following pairs represent isoelectronic ions?
	A. Na⁺ , K⁺
	B. K⁺ , Mg²⁺
	C. Mg²⁺ , Ca²⁺
	D. Ca²⁺, S²¯ Option”D” is correct

27.	₁₈Ar⁴º , ₁₉K⁴º and ₂₀Ca⁴º are –
	A. Institutional
	B. burdensome
	C. sumneutronic
	D. isoelectronic Option”B” is correct

28.	From which of the following emissions are isobars produced?
	A. α ray
	B. β ray
	C. γ ray
	D. x ray Option”B” is correct

29.	Which of the following pairs is/are correctly matched? 1. Isotopes – Atoms with same atomic number but different atomic mass 2. Isobaric – Atoms with same number of neutrons but different atomic number 3. Ineutronic – Atoms with same mass number Select the correct answer using the codes given below –
	A. 1,2 and 3
	B. only 1
	C. 1 and 2
	D. only 2 Option”B” is correct

30.	What is the number of protons (P) and neutrons respectively in Tritium (T)?
	A. 1p and 1n
	B. 1p and 2n
	C. 1p and 3n
	D. 2p and 1n Option”B” is correct

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