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Atomic Number and Mass Number

Question 26 I...

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Question 26
In the atom of an element X, 6 electrons are present in the outermost shell. If it acquires noble gas configuration by accepting the requisite number of electrons, then what would be the charge on the ion so formed?

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Solution

Element X has 6 electrons in the outermost shell. In order to acquire noble gas configuration, element X requires 2 electrons. So, the charge on the anion $(X^{2 -})$ so formed is - 2.

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Q. In the atom of an element, seven electrons are present in the outermost shell. If it acquires an inert gas configuration by receiving more electrons, charge on the ion formed will be:

Q. Question 24
One electron is present in the outermost shell of the atom of an element X. What would be the nature and value of charge on the ion formed if this electron is removed from the outermost shell?

An element X has 7 electrons in its L shell. What is true about the element X?

I. It belongs to period 9 of modern periodic table.

II. Its atom contains 9 protons.

III. It has a valency of 7.

IV. Its atoms can accept an electron to acquire noble gas configuration.

Q. The atom of an element X has 7 electrons in its M shell.

(a) Write the electronic configuration of element X.

(b) What is the atomic number of element X?

(c) Is it a metal or a non-metal?

(d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.

(e) What could element X be?

X

6

electrons in its outermost shell. Then the number of electrons shared by

X

with another atom to form a covalent bond is _______.

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Atomic Number and Mass Number

Standard IX Chemistry

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