Advertisements
Advertisements
Question
The ion of an element has 3 positive charges. The mass number of atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
Options
13
10
14
16
Advertisements
Solution
10
Explanation -
Mass number of the element = 27
Number of neutrons = 14
Number of protons = mass number – number of neutrons
= 27 – 14 = 13
As the ion of this element has 3 positive charges, it means that it has lost 3 electrons. Therefore, there are now 10 electrons in the ion.
RELATED QUESTIONS
Write down the electronic configuration of the following:
(a) `""_13^27"Y"`
(b) `""_17^35"Y"`
Element X has electronic configurations 2, 8, 18, 8, 1. Without identifying X,
- Predict the sign and charge on a simple ion of X.
- Write if X will be an oxidizing agent or a reducing agent. Why?
Choose the correct option
The number of valence electrons in O2- is :
If electrons are getting added to en element Y; then
Is Y getting oxidized or reduced?
Name or state the following:
Ion formed by the gain of an electron(s)
In the formation of (i) oxygen molecule (ii) carbon tetrachloride molecule, state the following:
- Electronic configuration of nearest inert gas attained.
- How many electrons are shared/transferred in bond formation
- Which type of bonds these compounds form?
- Draw their orbital diagrams.
Give a reason why noble gases have a stable electronic configuration.
Which of the following statement is always correct?
All non–metals will have ______ electrons in the outermost orbit of their atoms.
Select the INCORRECT statement.
