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Formation of Ions in Metals

Nuclear charg...

Question

Nuclear charge _________ with decrease in atomic number.

A

increases

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B

decreases

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C

remains same

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D

increases then decreases

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Solution

The correct option is B decreases
Nuclear charge decreases with decreases in atomic number as the number of proton decreases.

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Q. Assertion :The binding energy per nucleon, for nuclei with the atomic mass number

A > 100

, decreases with

A

. Reason: The nuclear forces are weak for heavier nuclei.

Q. Nuclear charge increases both in a period and group. But, effective nuclear charge increases in a period and decreases in a group. Identify the correct reverse trend.

Q. Assertion: First ionization energy for nitrogen is lower than oxygen
Reason: Across a period effective nuclear charge decreases

Q. Identify the correct statements from the following.
(a) An element with low ionization potential has high electropositivity and hence give out electrons easily.
(b) Due to decrease in ionization energy, in a group, the oxidizing property decreases.
(c) Electronegativity decreases along a period due to increase in nuclear charge and increase in atomic size.
(d) Due to increase in electron affinity the reducing property increases along a period.

Assertion: The atomic radius decreases as we move from left to right in a period.

Reason: Effective nuclear charge increases across the period from left to right.

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Formation of Ions in Metals

Standard VIII Chemistry

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