Step-by-step explanation:
B. 1) Tritium is the isotope of Hydrogen (H).
2) Mass of an Electron is 9.10938356 × 10-³¹ Kg.
3) Molecular mass of Carbon dioxide (CO2)
=> Molecular mass of carbon = 12g
Molecular mass of oxygen= 16g
molecular mass of CO2 = [12 + (16 X 2)]g
= (12 + 32)g
= 44 g
4) Dalton has given its Atomic Theory in the year 1803.
5) Nucleus is discovered by
= Ernest Rutherford discovered the nucleus of the atom in 1911.
hope this helps you.