An atom has a mass number of 24 and 13 neutrons. what is the atomic number of this atom? express
Z=atomic number (protons)
N=number of neutrons.
The atomic number of this atom is 11. (The element is sodium)
2.- A = 38, means that the isotope of argon has mass number of 38. Given that the atomic number of argon is 18, this isotope has 18 protons and 38 less 18 = 20 neutrons.Then, the nuclear symbol is Ar precedeed by the numbers 38 (upper left corner) and 18 (lower left corner).
mass number=no. of P+no. of N
no. of P(atomic number)=24-13=11
²⁴Na - sodium
atomic number is 11
The atomic number is 11, and this atom is sodium.