Advertisements
Advertisements
प्रश्न
Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Advertisements
उत्तर
Atomic mass = 4u
Atomic mass = Number of neutrons + Number of protons
4 = Number of neutrons + 2
Number of neutrons = 4 − 2
Number of neutrons = 2
∴ The number of neutrons in a helium atom = 2.
APPEARS IN
संबंधित प्रश्न
Name the three sub-atomic particles of an atom.
Which subatomic particle was discovered by : Chadwick ?
Name the subatomic particle whose relative charge is : 0
Fill in the blank of the following statement :
The subatomic particle not present in a hydrogen atom is ________
Name the element which does not contain any neutrons in its nucleus.
On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom?
Calculate the number of neutrons present in the nucleus of an element X which is represented as `""_15^31"X"`
James Chadwick discovered the fundamental particle called proton.
Write the properties of neutrons.
Which subatomic particles have no charge?
