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Worksheetsclassification of elements snd periodicity of properties
Total questions: 20
Worksheet time: 12mins
Iron (Fe) has the valence electronic configuration of 4s2 3d6. Which of the following is the correct position of Fe element?
Period: 4
group: 18
d-block
Period : 4
Group : 2
d-block
Period : 4
Group : 8
d-block
Choose the correct position for element Titanium (z= 22)
Period: 4
Group: 14
s-block
Period : 4
Group : 4
p-block
Period : 4
Group : 4
d-block
In the periodic table, the elements which are similar in their Chemical & physical properties are located in the same ................
period
group
nucleus
energy level
In the modern periodic table, the period indicates the value of:
Atomic number
Atomic mass
Principal quantum number
Azimuthal quantum number.
Which element has n=2 and s2 p6 configuration?
He
O
Ne
Ni
The family of elements with highest ionisation enthalpy :
alkaline earth metals
halogens
noble gases
alkali metals
Which of the following has the largest negative electron gain enthalpy?
F
Cl
Br
I
Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is:
Si > C > B > N > F
F > N > C > B > Si
F > N > C > Si > B
B > C > Si > N > F
Considering the elements F, Cl, O and N, the correct order of their chemical reactivity in terms of oxidizing property is:
F > Cl > O > N
F > O > Cl > N
Cl > F > O > N
O > F > N > Cl
The noble gases are unreactive because
they react with sodium.
they have a full outer shell of electrons.
they have a half outer shell of neutrons.
they have a half outer shell of neutrons.
The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all
halogens.
nobel gases.
nobel metals.
light metals.
The atoms of elements belonging to the same group of periodic table have the same
number of protons.
number of electrons.
number of neutrons.
number of electrons in the outermost shell.
Which of the following sets has strongest tendency to form anions?
Ga, In, Tl
Na, Mg, Al
N, O, F
V, Cr, Mn
The maximum number of elements in the third period is
(a)
On moving from left to right in a period in the Periodic table, the size of atom
Increases
Decreases
Does not change appreciably
First decreases and then increases
According to Mendeleev periodic law, the elements were arranged in the Periodic table in order of
Increasing atomic number
Decreasing atomic number
Increasing atomic mass
Decreasing atomic mass
Symbol of the element of atomic no 112 is. (a)
Which atom has the largest atomic radius?
potassium
rubidium
francium
cesium
How many electrons are there in the valence shell of the O2– ion?
2
8
10
6
