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Earn 100

Who proposed the Modern Atomic Theory in the year 1803?

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Important Questions on Atomic Structure

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Science>Chemistry>Atomic Structure>Modern atomic model
The smallest unit of an element that cannot be divided further is _____.
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Science>Chemistry>Atomic Structure>Modern atomic model
The central part of an atom is called nucleus.
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Science>Chemistry>Atomic Structure>Modern atomic model
Nucleus has no charge, it is neutral in nature.
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Science>Chemistry>Atomic Structure>Modern atomic model
Copper has an atomic number of 29 and an atomic mass of 63.55. How will you represent it?
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Science>Chemistry>Atomic Structure>Modern atomic model
Where is the nucleus of an atom situated?
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Science>Chemistry>Atomic Structure>Modern atomic model
The _____ of an atom is very hard and dense. (nucleus/ electron)
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Science>Chemistry>Atomic Structure>Modern atomic model
Protons and neutrons are collectively known as
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Science>Chemistry>Atomic Structure>Modern atomic model
_____ is the smallest part that take part in chemical reactions.
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Science>Chemistry>Atomic Structure>Modern atomic model
The number of electrons in an atom is equal to the number of
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Science>Chemistry>Atomic Structure>Modern atomic model
According to the modern atomic model, an atom can be divided into three regions.
MEDIUM
Science>Chemistry>Atomic Structure>Modern atomic model
Define Nucleons.
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Science>Chemistry>Atomic Structure>Modern atomic model
What are the orbits or shells of an atom?
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Science>Chemistry>Atomic Structure>Modern atomic model
Neutrons are _____ particles having mass equal to that of protons. (neutral/ positive/ negative)
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Science>Chemistry>Atomic Structure>Modern atomic model
From the periodic table, how will you find out the atomic number and mass number of an element?
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Science>Chemistry>Atomic Structure>Modern atomic model
Protons and _____ together are called nucleons.
MEDIUM
Science>Chemistry>Atomic Structure>Modern atomic model
An atom on the whole has a positive charge.
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Science>Chemistry>Atomic Structure>Modern atomic model
Cotyledons are also called-
HARD
Science>Chemistry>Atomic Structure>Modern atomic model

Give the salient features of "Modern atomic theory". 
 

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Science>Chemistry>Atomic Structure>Modern atomic model
An atom is electrically neutral.
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Science>Chemistry>Atomic Structure>Modern atomic model
Name three fundamental particles of an atom. Give the symbol with charge, on each particle.