WorksheetsPrep 2
Total questions: 10
Worksheet time: 8mins
The modern periodic table consists of ..... horizontal periods.
7
10
12
18
The transition elements starts to appear from the beginning of ....... period.
second
third
fourth
fifth
Lanthanides and actinides are located in the ..... block.
s
p
d
f
The number of negative electrons in the atom in its normal state equals ....
number of protons
number of neutrons
twice the number of protons
half the number of neutrons
The atomic number of the element that exists in group (7A) and period 2
12
7
9
17
The number of elements of period 4 is ...... the number of elements of period 3.
more than
equal
half
less than
Elements of the same period in the modern periodic table have the same ....
number of protons inside the nucleus
atomic number
number of energy levels
number of electrons of the outermost energy level
Elements of d block are arranged in ...... groups
2
5
6
10
Nobel gases are located in group .....
7A
8
17
18
The number of elements which exist in nature is ..... according to modern periodic table
29
118
92
67
