The atom of an element has mass number 20 and atomic number 10. Find :

1.	The atom of an element has mass number 20 and atomic number 10. Find :() The numbr of protons, electrons and neutrons( Write its electronic configuration.- (in) What will be its valency ? Write the number of valence electrons. (2
Answer» Atomic number is 10 hence number of protons will be 10 Electrons will be 10 and as 10*2=20 is the mass number hence neutrons will be 10 Electronic configuration 1s^2 2s^2 2p^6

The atom of an element has mass number 20 and atomic number 10. Find :() The numbr of protons, electrons and neutrons( Write its electronic configuration.- (in) What will be its valency ? Write the number of valence electrons. (2

Answer»

Atomic number is 10 hence number of protons will be 10

Electrons will be 10 and as 10*2=20 is the mass number hence neutrons will be 10

Electronic configuration 1s^2 2s^2 2p^6