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प्रश्न
Give two examples for each of ionic and covalent bond.
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उत्तर
Example of ionic bonds— Sodium chloride and calcium oxide.
Example of covalent bond— Water, carbon dioxide.
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संबंधित प्रश्न
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
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
Name the particles which revolve around the nucleus.
Define: Covalent bond
What does the word ‘atom’ mean?
Define: An Atom:
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
How many times is a proton heavier than an electron?
State two observations which show that atom is not indivisible.
What is an atom ? How do atoms usually exist ?
In what respects do the three isotopes of hydrogen differ? Give their structures.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Draw the structure of an atom and explain the position of the sub-atomic particles.
1 mole of Gold and Silver contain same number of atoms.
Give the salient features of “Modern atomic theory”.
