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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
WRITE SHORT ANSWER
Define an ionic compound.
Define:- Radicals
Define: Ions
How did Neils Bohr visualise the atom ?
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
What are the building blocks of matter ?
What is an atom ? How do atoms usually exist ?
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.
Draw the diagrams representing the atomic structures of the following: Neon
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Which will form negative ion?
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.
Element
State true or false. If false, correct the statement.
An atom is electrically neutral.
Define the following term with an example.
Metal
Atoms of one element can be transmuted into atoms of other elements by ______
The number of atoms present in a molecule is called its ______.
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.
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
