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प्रश्न
Multiple Choice Questions
number of valence electrons present in magnesium is
विकल्प
two
three
four
five
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उत्तर
two
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संबंधित प्रश्न
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Write true or false for the following statement
The central pad of the atom is called nucleus.
Give the following a suitable word/phrase.
Protons and neutrons present in the nucleus.
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................shell.
FILL IN THE BLANK
The γ-rays are............................ radiations, like light.
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.
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Name the three fundamental particles of an atom.
Define the term Valence shell.
