Advertisements
Advertisements
Question
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 __________.
Options
+2
−2
−1
Advertisements
Solution
An element ‘X has six electrons in its outer or valence shell. Its valency is −2.
APPEARS IN
RELATED QUESTIONS
Fill in the blank
The outermost shell of an atom is known as............................
Give the following a suitable word/phrase
Arrangement of electrons in the shells of an atom.
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
Define the term Atomic number.
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................shell.
WRITE SHORT ANSWER
What is the charge on a neutron ?
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
The particle not present in an ordinary hydrogen atom is :
Select the correct answer from the choice in the bracket to complete the sentence:
A ________ is a sub-atomic particle with no charge and unit mass.
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`
