Question

30. For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them 31. An element has Z = 7. What is the valency of the element ? Also name the element.​

Answer 1

Explanation:

H, D and T are the three isotopes of hydrogen with same atomic number and different mass numbers of 1, 2 and 3 respectively.

Concept insight: Recall the mass numbers of each of the isotopes.