ICSE chemistry
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Choose the correct answer from the option given below:
An element in period -3 whose electron affinity is zero:
-
Neon
-
Sulphur
-
Sodium
-
Argon
D.
Argon
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An alkaline earth metal:
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Potassium
-
Calcium
-
Lead
-
Copper
A.
Potassium
Give reasons for the following:
The ionisation potential of the element increases across a period.
Atomic size decreases and nuclear charges increases as we move from left to right in a period so the energy required to remove one electron from the valence shell increases from left to right thus ionisation potential increases.
Alkali metals are good reducing agents.
Alkali metals readily lose electrons from their valence shell and get oxidised. So they behave as good reducing agents.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
Sodium(Na)
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Mock Test Series
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