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प्रश्न
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
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उत्तर
This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
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संबंधित प्रश्न
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
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
Describe a discharge tube.
WRITE SHORT ANSWER
What do you mean by electron transition?
Draw the electronic configuration of the following elements clearly stating the number of neutrons and protons in their nucleus.
a. Beryllium b. Silicon
c. Chlorine d. Aluminium
e. Nitrogen
ANSWER IN DETAIL
Write a note on valence shell.
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Which of the following statement is always correct?
Define the term Mass number.
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 __________.
