There are six electrons, six protons and six neutrons in an atom of an element. What is the atomic number of the element ?
6
12
18
24
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2016
– In a neutral atom, Number of Protons = Number of Electrons.
– The mass number is the total number of protons and neutrons in the nucleus (Mass Number = Protons + Neutrons).
– In this case, Protons = 6, Electrons = 6, Neutrons = 6.
– Atomic Number = 6.
– Mass Number = 6 + 6 = 12. This describes an atom of Carbon-12.