Which if the following statement is incorrect for an atom configuration 2, 8, 7?

It forms diatomic molecules

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It is non metal elements

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Its valency is 1

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It forms basic oxide.

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Solution

The correct option is C It forms basic oxide.
total $e^{-} \Rightarrow 17$
$∴ C l$
It forms $C l_{2}$
It is non metal.
It is monovalent.
It forms audic oxide.

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Similar questions

Q. Select the correct answer:
(i) Which of the following electronic structures is of a metal?
(a) 2, 8, 8
(b) 2,7
(c) 2, 8, 2
(d) 2, 8, 4

(ii) Atomic radii of fluorine and neon in angstrom unit are
(a) 0.72, 13.6
(b) 1.60, 1.60
(c) 0.72, 0.72
(d) none of these

(iii) Configuration of an element is 2, 8, 1. Which of the following statement is true?
(a) Valency of element is 7
(b) Element is diatomic
(c) Element is non-metal
(d) Element forms basic oxide

(iv) Which of the following element has highest electronegativity?
(a) F
(b) H
(c) Ne
(d) Na

Statement-1: An atom of valency 2 can combine with 2 other atoms of valency 1.
Statement-2: The valency of an element is the measure of its combining power with other atoms, when it forms chemical compounds or molecules.

An element forms an oxide which is basic in nature.State whether the element is a metal or non-metal ?

Q. Element X is a metal with a valency 2, Y is a non-metal with a valency 3. If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.

Q. Element

X

is an metal with a valency

2

. Element

Y

is a non-metal with a valency

3

.If

Y

is a diatomic gas, write the equation for the direct combination of

X

and

Y

to form a compound.

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Which if the following statement is incorrect for an atom configuration 2, 8, 7?

The correct option is C It forms basic oxide.total e−⇒17 ∴ClIt forms Cl2 It is non metal. It is monovalent.It forms audic oxide.

The correct option is C It forms basic oxide.
total $e^{-} \Rightarrow 17$
$∴ C l$
It forms $C l_{2}$
It is non metal.
It is monovalent.
It forms audic oxide.