Advertisements
Advertisements
प्रश्न
Name the unit in which the radius of an atom is usually expressed.
Advertisements
उत्तर
The radius of an atom is usually expressed in nanometre (nm).
APPEARS IN
संबंधित प्रश्न
WRITE SHORT ANSWER
Define an ionic compound.
ANSWER IN DETAIL
How are isobars different from isotopes ?
Write the names of `"FeS"` compounds :
Name the particle or particles you would expect to find in :
The nucleus of an atom
Fill in the blank
An _______ is electrically neutral.
Write the relation between nanometre and metre.
Why is it not possible to see an atom even with the most powerful microscope ?
State two observations which show that atom is not indivisible.
What is an atom ? How do atoms usually exist ?
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.
Which of the following statement is correct about the atom of an element ?
Define the following term:
Atom
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Name the sub-atomic particles.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
Define the following term with an example.
Non-metal
Atoms of one element can be transmuted into atoms of other elements by ______
The number of atoms present in a molecule is called its ______.
Write any two observations which support the fact that atoms are divisible.
