NCERT Class XI Chemistry Classification of Elements and Periodicity in Properties Solutions
© examsnet.com
Question : 27
Total: 40
Use the periodic table to answer the following questions.
(a) Identify an element with five electrons in the outer subshell.
(b) Identify an element that would tend to lose two electrons.
(c) Identify an element that would tend to gain two electrons.
(d) Identify the group having metal, non-metal, liquid as well as gas at the room temperature.
(a) Identify an element with five electrons in the outer subshell.
(b) Identify an element that would tend to lose two electrons.
(c) Identify an element that would tend to gain two electrons.
(d) Identify the group having metal, non-metal, liquid as well as gas at the room temperature.
Solution:
(a) Fluorine
(b) Magnesium
(c) Oxygen
(d) Group 17 (Halogens) :
F, Cl – Non metals and gases
Br – Non metal and liquid
I – Shows metallic lustre.
(b) Magnesium
(c) Oxygen
(d) Group 17 (Halogens) :
F, Cl – Non metals and gases
Br – Non metal and liquid
I – Shows metallic lustre.
© examsnet.com
Go to Question: