An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom.

An atom baving mass number 40 has 20 neutrons in its nucleus. What is the atomic number of the clement?

An atom which has a mass number of 14 and has 8 neutrons is an:

An atom which has a mass number of 14 and 8 neutrons is an

(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom? (b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it ? What is the atomic number of the element ?

An isotope of atomic mass 25 has 13 neutrons in its neucleus .What is its atomic number and what are the name and chemicalsymbol of the element ?

An isotope of atomic mass 25 has 13 neutrons in its neucleus .What is its atomic number and what are the name and chemicalsymbol of the element ?

Nucleus of an atom has 6 protons and 8 neutrons. What is its atomic number and mass number? What is this element?

The mass number of an atom is 31 . The M shell. of this atom contains 5 electron. A)What is the atomic number of this atom?.B)How many neutrons does this atom have?.C)Write the electronic configuration.