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प्रश्न
Give two examples for each of ionic and covalent bond.
उत्तर
Example of ionic bonds— Sodium chloride and calcium oxide.
Example of covalent bond— Water, carbon dioxide.
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संबंधित प्रश्न
Define: Mass number
Define: Relative atomic mass
Define: Covalent bond
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Electron, proton, neutron are the types of ______ in an atom.
The electron shell ______ is nearest to the nucleus.
In what respects do the three isotopes of hydrogen differ? Give their structures.
Draw the electron dot structure of this compound.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
The smaller particles found in the atom is called ______.
Define the following term with an example.
Compound
1 mole of Gold and Silver contain same number of atoms.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
Lead is also known as plumbum.
What are the 3 most abundant atoms on the earth?
