Single Choice

Indicate the wrong statement on the basis of the periodic table.

AThe most electronegative element in the periodic table is fluorine.
BScandium is the first transition element and belongs to fourth period.
CThere are three transition series in the periodic table each containing 10 elements.
Correct Answer
DAlong a period halogens have maximum negative electron gain enthalpy.

Solution

There are four transition series in the periodic table. The electronic configurations are given below.
1) $$3d$$ series: $$[Ar]$$ $$3d^{1-10}4s^{1-2}$$
2) $$4d $$ series: $$[Kr]$$ $$4d^{1-10}5s^{0-2}$$
3) $$5d$$ series: $$[Xe]$$ $$5d^{1-10}6s^{2}$$
4) $$6d$$ series: $$[Rn]$$ $$6d^{1-10}7s^{2}$$

SIMILAR QUESTIONS

Periodic Classification of Elements

The type of elements present in group 3 to 12[IB to VIIB and VIII] are :

Periodic Classification of Elements

Which of the following sets of atomic numbers corresponds to the atomic numbers of inert gases belonging to periods which contain 4d and 5d transition series?

Periodic Classification of Elements

An element having electronic configuration $$ [Ar] 3d^24s^2 $$ belongs to:

Periodic Classification of Elements

Give the formula and valency of chromate.

Periodic Classification of Elements

Which give coloured carbonate precipitate?

Periodic Classification of Elements

Which of the following is not correct statement for periodic classification of elements?

Periodic Classification of Elements

There are many elements in the periodic table which exhibit variable valency. This is a particular characteristic of :

Periodic Classification of Elements

Which of the following is a transition element?

Periodic Classification of Elements

Give the formula and valency of chromate.

Periodic Classification of Elements

What are transition elements ? Why are they so called ? Name the different transitions series.

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