On going across a period in the periodic table, the elements tend to become less metallic in character. Which one of the following is not an indication of this trend?

There is an overall increase in molar mass

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There is an increase in electronegativity

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There is an overall decrease in ionisation energy

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There is a change in bond type for ionic to covalent

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Solution

The correct option is D There is an overall decrease in ionisation energy
Ionization energy is the amount of energy required to remove the most loosely bound electron. The ionization energy increases in going from left to right in the periodic table as the effective nuclear charge increases in the same shell on moving from left to right.

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Q. In the periodic table, with the increase in atomic number the metallic character of an element?

Q. Which of the following is the WORST explanation for the increase in ionization energy of the elements going from left to right across a row of the periodic table?

Q. Question 25
Which one of the following does not increase while moving down the group of the periodic table?

(a) Atomic radius
(b) Metallic character
(c) Valency
(d) Number of shells in an element

Q. Assertion :A decrease in ionisation potential of an element leads to decrease in non-metallic character of the element. Reason: As ionisation potential decreases, its ability to loose electron increases while its ability to gain electron decreases

(i) Electropositive nature of the element(s) increases down the group and decreases across the period
(ii) Electronegativity of the element decreases down the group and increases across the period
(iii) Atomic size increases down the group and decreases across a period (left to right)
(iv) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the element which is a metalloid

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