he number of electrons, protons and neutrons in a species are equal to 10, 12 and 13 respectively. Assign the proper symbol to the species.
Answers
Answer
No. of protons =12, hence atomic no =12
so the element is Mg.
It has two electron less than the no. of protons, hence it has 2 +ve charge. No of neutrons =13
Mass number =no of protons +no of neutrons =12+13=25
25 2+
Therefore the symbol of that species is Mg
12
Given info : the number of electrons, protons and neutrons in a species are equal to 10, 12 and 13 respectively.
To find : the proper symbol to the species is ...
solution : before solving it, we need to understand some basic principles of element.
in a pure element,
- no of protons = no of electrons
- no of protons = atomic no
- and mass no = no of protons + no of neutrons
- if no of electrons > no of protons, it means an atom of element gains electrons so the charge on it is negative and it is equal to no of extra electrons.
- if no of protons > no of electrons, it means an atom of element loses electrons so the charge on it is positive and its value equals to ( no of protons - no of electrons).
here no of electrons = 10
no of protons = 12
no of neutrons = 13
∴ atomic no = 12 we know it is magnesium.i.e., Mg.
but two electrons are removed from it ground state so, the symbol of it will be Mg²⁺.
therefore the the proper symbol to the species is Mg²⁺ .