जिस तत्व के परमाणु दो प्रो� – McqOptions

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1.	जिस तत्व के परमाणु दो प्रोटॉन, दो न्यूट्रॉन और दो इलेक्ट्रॉन हों, उस तत्व की द्रव्यमान संख्या कितनी होती है -
A.	2
B.	4
C.	6
D.	8
Answer» C. 6

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