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प्रश्न
What are the building blocks of matter ?
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उत्तर
Atoms and molecules are the building blocks of matter.
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संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
Define:- Atom
Write the names of the elements present in the:-
Ammonia
Fill in the blank
An ion with positive charge is called ______
Define: Ions
What are orbits or shells ?
State two observations which show that atom is not indivisible.
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.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
The smallest particle of matter that can exist by itself is ______.
A compound containing one atom of carbon and two atoms of oxygen is ______.
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Define the following term with an example.
Non-metal
An element is composed of ______ atoms.
Define the term ions or radicals.
What are the 3 most abundant atoms on the earth?
