Given the isotope name potassium-57.Find the atomic number, mass number, number of protons, number of electrons, and number of neutrons in it.

Open in App

Solution

As we know that potassium is the 19^th element in the periodic table since its atomic number is 19.
The number of protons and atomic number are the same hence, the number of protons=19.
A neutral atom has an equal number of protons and electrons since the atom is electrically neutral. Thus the number of electrons=19.
The mass number is given as 57.
Mass number=sum of a number of protons and neutrons.
Thus number of neutrons=mass number -number of protons=(57-19)=38.
atomic number=19, mass number=57, number of protons=19, number of electrons=19, number of neutrons=38.

Suggest Corrections

Similar questions

Given the mass number and number of electrons of a neutral atom as 24 and 11 respectively. Find the name of isotopes, atomic number, number of protons, and number of neutrons.

Mass number and atomic number of an atom is given as 131 and 53 respectively. Find the name of isotope, atomic number, and number of neutrons and electrons.

Given the element aluminium with atomic number 13 and number of neutrons 14.Find the mass number, number of protons, number of electrons and electronic configuration.

Calculate the number of electrons,protons and neutrons in Phosphorus atom provided its atomic number is 17 and mass number is 35.

Q. Complete the following table.

(i)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
9	-	10	-	-	-

(ii)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

(iii)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
16	32	-	-	-	Sulphur

(iv)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	2	-	1	-	-

(v)

Atomic number	Mass number	Number of neutrons	Number of protons	Number of electrons	Name of the Atomic species
-	1	0	1	1	-

Join BYJU'S Learning Program