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प्रश्न
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 __________.
पर्याय
+2
−2
−1
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उत्तर
An element ‘X has six electrons in its outer or valence shell. Its valency is −2.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Mention briefly the salient features of Dalton’s atomic theory (five points)
What are the two main parts of which an atom is made of?
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
TRUE \ FALSE
Electrons are present in the nucleus.
Name the negatively charged particle present in the atoms of all the elements.
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
`""_1"H"^1`, `""_0"n"^1`,`""_(-1)"e"^0`
