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Goldstein's Discovery of Protons

When electron...

Question

When electrons are removed from an atom, then it is called ______________.
(a) a molecule
(b) a nucleus
(c) an ion
(d) a gas

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Solution

(b) a nucleus

When electrons are removed from an atom, it is called a nucleus.

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Q. When electrons are removed from an atom, then it is called ______________.
(a) a molecule
(b) a nucleus
(c) an ion
(d) a gas

Q. The Columbian forces are responsible for binding.
I. An atom to an atom to form a molecule
II. An electron to a nucleus to form an atom
III. A molecule to a molecule to form a solid or a liquid
Which combination is correct?

Q. The smallest particle of a substance is called

(a) a molecule
(b) an atom
(c) an element
(d) a compound

Q. The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called _______. (electron affinity, ionisation potential, electronegativity).

Q. During a negative beta decay,
(a) an atomic electron is ejected
(b) an electron which is already present within the nucleus is ejected
(c) a neutron in the nucleus decays emitting an electron
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