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Published on: 26/08/2019
Structure of the Atom
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Questions + Answers key
Take MCQ Science Test
1.
What are canal rays?
2.
Almost all the mass of an atom is concentrated in a small region of space called ...........
3.
According to Rutherford, the force of attraction between the moving electrons and ............. is counter balanced by the centrifugal force of electrons.
4.
E.Rutherford used ............ particles in his scattering experiments
5.
The negative particle discovered by J.J.Thomson was given name ........
6.
Substance having similar chemical properties, but different physical properties are called ______
7.
An atom containing 16 electrons and 16 neutrons is represented as
\(_{16}^{16}A\)
\(_{16}^{32}A\)
\(_{16}^{0}A\)
\(_{0}^{16}A\)
8.
The atomic number of neon (Ne), magnesium (Mg2+), aluminium (Al3+ ) and phosphorus (P3-) are 10, 12, 13 and 15 respectively.Select the odd species in terms of electronic configuration.
Ne
Mg2+
Al3+
P3-
9.
\(\alpha\)-particle is made up of
2 electrons and 2 protons
2 protons and 2 neutrons
2 electrons and 2 neutrons
helium atoms
1.
Canal rays are positively charged radiations. These rays consist of positively charged particles known as protons. They were discovered by Goldstein in 1886.
2.
( )
nucleus
3.
( )
nucleus
4.
( )
alpha
5.
( )
electron
6.
( )
isotopes
7.
(b)
\(_{16}^{32}A\)
8.
(d)
P3-
9.
(b)
2 protons and 2 neutrons
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