Number of electrons present in the species H2, He, H2 and O2 respectively are:
1, 2, 2, 15
The number of electrons in H2 (1 electron per H atom, so 2 electrons), He (2 electrons), H2 (1 electron per H atom, so 2 electrons), and O2 (16 electrons) are correct as per option (a).
Which of the following statements is correct according to the law of conservation of mass?
Which of the following is formed when carbon dioxide reacts with calcium hydroxide?
Which of the following types of reaction represents formation of slaked lime from calcium oxide and water?
Which of the following has a pH value of 7?