The density of elements of 3 d series across a period-A- Decreases from left to right across a periodB- Remain constant throughoutC- Increases from left to right across a periodD- First increases then decreases

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Standard XII

Chemistry

Physical Properties of Boron Family

The density o...

Question

The density of elements of 3d series across a period:

Remain constant throughout

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Decreases from left to right across a period

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Increases from left to right across a period

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First increases then decreases

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Solution

The correct option is C
Increases from left to right across a period

The decrease in metallic radius coupled with increase in atomic mass results in a general increase in the density of these elements across a period.

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Similar questions

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.

Q. On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?

(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases

(a) Electropositive nature of the element(s) increases down the group and decreases across the period.
(b) Electronegativity of the element decreases down the group and increases across the period.
(c) Atomic size increases down the group and decreases across a period (left to right).
(d) 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 most electronegative element :

Q. Question 48 (d)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) 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.

(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 shows maximum valency.

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The density of elements of 3d series across a period:

The correct option is C Increases from left to right across a period The decrease in metallic radius coupled with increase in atomic mass results in a general increase in the density of these elements across a period.

The correct option is C
Increases from left to right across a period

The decrease in metallic radius coupled with increase in atomic mass results in a general increase in the density of these elements across a period.