Advertisements
Advertisements
प्रश्न
Select the correct answer from the choice in the bracket to complete the sentence:
Magnesium atom with electronic configuration 2, 8, 2 achieves stable electronic configuration by losing two electrons, thereby achieving stable electronic configuration of the nearest noble gas _______.
पर्याय
neon
argon
Advertisements
उत्तर
Magnesium atom with electronic configuration 2, 8, 2 achieves stable electronic configuration by losing two electrons, thereby achieving stable electronic configuration of the nearest noble gas neon.
APPEARS IN
संबंधित प्रश्न
Write true or false for the following statement
The maximum number of electrons in the first shell can be 8.
Write true or false for the following statement
The central pad of the atom is called nucleus.
FILL IN THE BLANK
The electrons revolving in shells close to the nucleus are called ................... electrons.
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................shell.
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
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
Compare a proton and a neutron in respect of mass and charge.
Define the term Mass number.
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
Select the correct answer from the choice in the bracket to complete the sentence:
An element ‘X’ has six electrons in its outer or valence shell. Its valency is __________.
