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प्रश्न
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?
उत्तर
(a) Electronic configuration of the element X is
Element X : \[{\underset{2}{\text{ K }}\underset{8}{\text{ L }}\underset{7}{\text{ M }}}\]
(b) Atomic number of the element X will be 17.
(c) Element X is a non-metal because there are 7 electrons in its outermost orbit. In order to complete its octet (to get 8 electrons), it will gain one electron. An element which gains electrons in order to complete its octet is a non-metal.
(d) The element will form an anion by gaining an extra electron in order to complete its octet.
Symbol of an ion of X will be X–.(e) X is Chlorine.
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संबंधित प्रश्न
What is the maximum number of electrons which can be accommodated in the K shell of an atom?
What is the maximum number of electrons an M shell of the atom can accommodate?
What is the maximum number of electrons that can go into the N shell of an atom?
State the number of electrons present in the outermost shell of the atoms of the following elements :(i) Neon
(ii) Chlorine
Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element?
Explain the octet rule for the formation of –
Sodium chloride from a sodium atom and a chlorine atom.
Give a reason for the following:
The shells surrounding the nucleus of an atom are also called ‘energy levels’.
The outermost shell of an atom cannot accommodate electrons more than ______.
How will you define the term ‘electronic configuration’?
Explain the electronic configuration of atoms with an illustration.
