Question

$Ca$ has atomic no. 20 and atomic weight 40. Which of the following statements is not correct about $Ca$atom

• A. The number of electrons is same as the number of neutrons
• B. The number of nucleons is double of the number of electrons
• C. The number of protons is half of the number of neutrons
• D. The number of nucleons is double of the atomic number

Answer 1

Answer: (C)

The number of protons is half of the number of neutrons

Answer 2

$20 ⥂ Ca^{40}$ has 20 proton, 20 neutron.