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प्रश्न
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
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उत्तर
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
How are isobars different from isotopes ?
Write the names of `("NH"_4)_2"SO"_4` compounds:
Write the names of `"Na"_3"PO"_4` compounds :
Fill in the blank
An ion with positive charge is called ______
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
Define: An Atom:
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 ?
Fill in the blank
An excess of electrons produces a ________ charge.
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.
Electron, proton, neutron are the types of ______ in an atom.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
A compound containing one atom of carbon and two atoms of oxygen is ______.
The smaller particles found in the atom is called ______.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Define – Atom.
Name the sub-atomic particles.
______ is the smallest particle of an element.
Define the term ions or radicals.
Atoms of different elements having the same number of ______ are called isotones.
1 mole of Gold and Silver contain same number of atoms.
Does the solubility of a substance change with temperature? Explain with the help of an example.
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
The most abundant type of atom is the universe is ______.
What is the fundamental particle of an element?
