Class 9 Chemistry MCQ
Which element has highest electronegativity?
CI
F
Br
I
The modern periodic table is based on:
Atomic number
Mass number
Relative mass
Nil
________________ elements were discovered in year 1800.
34
35
36
37
Following are elements of 2nd period.Which atom is bigger in size?
Li
Be
B
C
Modern periodic table can be classified into ________________.
Elements
s, p, d, f blocks
Periods
ROWS
Transition elements are:
all gases
all metals
all non-metals
all metalloids
The vertical columns in the periodic table are called:
perlods
groups
rows
blocks
Long form of periodic Table is constructed the basis of:
Mendeleev postulate
atomic number
atomic mass
mass number
The atomic number of potassium is:
11
15
18
19
The amount of energy given out when an electron is added to any atom is called:
lattice energy
ionization energy
electronegative
electron affinity
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