The electronic configuration of Lithium is.…
a) 2s2,2p1
b) 1s1,2s2
c) 1s2,3s1
d) 1s2,2s1
The element Carbon having the electrons distribution such as …………
a) 1s2,2s1,2p3
b) 1s1,2s2,2p3
c) 1s2,2s2,2p2
d) 1s1,2s1,2p4
Argon has electronic configuration of ………
a) 1s1,2s3,2p2,3s2,3p3
b) 1s2,2s3,2p6,3s2,3p6
c) 1s1,2s2,2p6,3s2,3p6
d) 1s2,2s2,2p6,3s2,3p6
Atoms of same element having same atomic number but different mass number called……
a) triads
b) Isotopes
c) Octaves
d) Isomers
In isotopes atomic number is different due to different number of ……….
a) electrons
b) neutrons
c) protons
d) all of these
Isotopes have similar ………….. properties
a) physical
b) chemical
c) a & b both
d) none of these
Explanation:As the isotopes contain same number of protons so they have same chemical properties.
