Advertisements
Advertisements
Question
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?
Advertisements
Solution
(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.
APPEARS IN
RELATED QUESTIONS
Summarize the rules for writing of distribution of electrons in various shells for the first eighteen elements.
What is the maximum number of electrons an M shell of the atom can accommodate?
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?
Give scientific reason.
Atomic mass number is a whole number.
Explain the octet rule for the formation of –
Sodium chloride from a sodium atom and a chlorine atom.
Select the correct answer from the answer in the bracket to complete the sentence.
The maximum number of electrons in M-shell is _______.
Name an element which has the same number of electrons in its first and second shell.
The electron distribution in an aluminium atom is
The electronic configuration of silicon is ——— and that of sulphur is ———.
The maximum No. of electrons that can be accommodated in the M shell is ______.
