Advertisements
Advertisements
Question
Give two examples for each of ionic and covalent bond.
Advertisements
Solution
Example of ionic bonds— Sodium chloride and calcium oxide.
Example of covalent bond— Water, carbon dioxide.
APPEARS IN
RELATED QUESTIONS
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
WRITE SHORT ANSWER
What is radioactivity?
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define: Ions
Define: Mass number
Define: Relative atomic mass
How did Neils Bohr visualise the atom ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
Name the three subatomic particles present in an atom.
What are the building blocks of matter ?
Why is it not possible to see an atom even with the most powerful microscope ?
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.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
In what respects do the three isotopes of hydrogen differ? Give their structures.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
Define the following term with an example.
Metal
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
