Advertisements
Advertisements
प्रश्न
Define the following term with an example.
Non-metal
उत्तर
Non-Metal: Non-metal is an element that doesn’t have the characteristics of metal including, (i.e.) ability to conduct heat or electricity luster or flexibility.
Ex. Carbon Iodine, Sulphur.
APPEARS IN
संबंधित प्रश्न
WRITE SHORT ANSWER
Define an ionic compound.
WRITE SHORT ANSWER
Name three inert gases.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Write the names of the elements present in the:-
Sodium hydroxide
Write the names of `("NH"_4)_2"SO"_4` compounds:
Define: Ions
Define: Chemical bond
Define: Mass number
Define: Relative atomic mass
What does an atom consist of ? Explain.
Define: Covalent bond
Fill in the blank
If an atom gains an electron, it is called an _______
One nm is equal to :
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.
Find the mass of 2 moles of nitrogen atoms.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Define the following term:
Atom
Deduce from the datum provided.
Datum | To deduce |
\[\ce{_11^23Na}\] | Neutron number |
\[\ce{_6^14C}\] | Mass number |
\[\ce{_17^37 Cl}\] | Proton number |
The basic unit of matter is ______.
K: Potassium:: C: ______.
The volume occupied by 4.4 g of CO2 at S.T.P ______
A change in the physical state can be brought about
Write any two observations which support the fact that atoms are divisible.
The most abundant type of atom is the universe is ______.
______ is a substance that is made up of three oxygen atoms chemically combined.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Atoms have a radius of the order ______.