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प्रश्न
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
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उत्तर
Mass number
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संबंधित प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
Define the term Atomic number.
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
Tick the most appropriate answer.
Which of the following scientists observed that cathode rays consists of negatively charged particles?
- John Dalton
- J J Thomson
- James Chadwick
- Democritus
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.
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Define the term Mass number.
Define the term Nucleons.
What is meant by the term subatomic particles?
