Advertisements
Advertisements
प्रश्न
Define the term Mass number.
Advertisements
उत्तर
Mass number refers to the sum of the number of protons and neutrons present in the nucleus of an atom and denoted by A Mass number = Number of protons + Number of neutrons.
APPEARS IN
संबंधित प्रश्न
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Multiple Choice Questions
The outermost shell of an atom is known as
Tick the most appropriate answer.
In 1908, R A Millikan found the charge of an electron to be
- 1.6 x 10-19 C
- 1.6 x 10-15 C
- 1.4 x 10-19 C
- 1.6 x 19-16 C.
WRITE SHORT ANSWER
What do you mean by electron transition?
WRITE SHORT ANSWER
What is the number of neutrons present in a potassium atom ?
ANSWER IN DETAIL
What is the maximum number of electrons that L shell can accommodate ? Give reasons for your answer.
Compare an electron and a proton in respect of mass and charge.
State its one drawback of Rutherford’s atomic model.
Define the term Nucleons.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
