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Reactivity Trends (Group 2)

An atom of an...

Question

An atom of an element has electronic configuration of 2, 8, 1. Which of the following statements is correct?

A

The elements valency is 7

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B

The element exist as a diatomic molecule

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C

The element is non-metallic in nature

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D

The element forms a basic Oxide

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Solution

The correct option is D
The element forms a basic Oxide

The element with configuration 2, 8, 1 is Na or sodium. Sodium being a metal forms basic oxides.

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Similar questions

Q. What is the valency of an element with its electronic configuration 2, 8, 1?

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

Q. An element A has an atomic number 6 and mass number 12, while element B has an electronic configuration of 2, 8, 2. Which of the following options is incorrect?

Q. An atom has 2K,8L,5M electrons. Which of the following is its correct electronic configuration?

A

has electronic configuration 2,8,1 and

B

has 2,8,7. Which one will have higher electron affinity?

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