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प्रश्न
Fill in the blank
A deficiency of electrons produces a ________ charge.
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उत्तर
A deficiency of electrons produces a positive charge.
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संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Define:- Atom
Define: Ions
Name the particles which revolve around the nucleus.
Define: Covalent bond
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Define the following term:
Atom
The electron shell ______ is nearest to the nucleus.
Draw the electron dot structure of this compound.
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
A compound containing one atom of carbon and two atoms of oxygen is ______.
Define the following term with an example.
Metalloid
______ is the smallest particle of an element.
In the nucleus of `""_20"Ca"^40`, there are ______
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
