Advertisements
Advertisements
प्रश्न
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Advertisements
उत्तर
(a) Atomic no. of the element = 18.
(b) Element Z is a non-metal
(c) Element Z will not form any ion because its outermost shell is complete.
(d) Outermost electronic shell of the atom of this element is completely filled with electrons.
(e) Name of element Z is Argon Symbol is Ar.
(f) Z belongs to the noble gases group or the zero group of the periodic table.
APPEARS IN
संबंधित प्रश्न
WRITE SHORT ANSWER
Name three inert gases.
Define:- Molecule
Write the names of the elements present in the:-
Glucose
Write the names of `("NH"_4)_2"SO"_4` compounds:
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Fill in the blank
A charged particle is called an _____
Fill in the blank
A deficiency of electrons produces a ________ charge.
Is it possible to see atoms these days ? Explain your answer.
What is an atom ? How do atoms usually exist ?
One nm is equal to :
Define the following term:
Atom
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Define the following term with an example.
Metal
Define the following term with an example.
Metalloid
Write any two observations which support the fact that atoms are divisible.
The graphite refill used is pencil is made of element called ______.
Atoms have a radius of the order ______.
