Question

QUES1 : Locate the position of the element in the periodic table if its configuration is:

(a) ns2 np4 if n=4

(b) (n-1)d2 ns2 if n=5

(c) ns2 np4 if n=2.

QUES2 : Identify the element and locate their position in the periodic table of the elements whose configuration is:

(a) 1s2 2s2 2p6 3s2

(b) 1s2 2s2 2p2

(c) 1s2 2s2 2p6 3s2 3p4

(d) 1s2 2s2 2p6 3s2 3p6 4s2 3d3.

QUES3 : An element X belong to 4th period of periodic block. It has 4 electrons in the valence shell. Identify element.

QUES4 : Identify the family to which the element has full elctronic configuration belong:

(a) ns2

(b) ns2 np6

(c) ns2 np5.

QUES5 : Write a number of element present in

(a) 3rd period and 16th group

(b) 2nd period and 15th group of periodic table.

QUES6 : Outermost electronic configuration of elements is given:

(a) 6s2 4f2

(b) 5s2 5p3

(c) 5s2 4d6.

QUES7 : Write the IUPAC name of element Z=102.

Answer 1

1: a : 4s2 4p4

Atomic number :34
d block element
Selenium

b:4d2 5s2
atomic no: 38
d block element
strongium

C:2s2 2p4
Z=6
Carbon
carbon family
left side of periodic table
2:
a:Z=12
Magnesium
second group second 3 period
alkaline earth metal
b:Z=6
carbon
carbon family
C:Z=16
sulphur
oxygen family
d:Z=23
d block element
vanadium

3: Z=32
Germanium
Carbon family

4: a: alkaline metal family
b: oxygen family
C: Nitrogen family

5 a: 16
b:7