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Thomson's Discovery of Electrons

A positive io...

Question

A positive ion is formed when an atom gains an electron.

A

True

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B

False

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Solution

The correct option is B False
Ions are charged particles formed by the gain or loss of electrons by an atom.
A positive ion is formed when an atom loses an electron. It is called a cation.
A negative ion is formed when an atom adds an electron. It is called an anion.
Therefore, the given statement is false.

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Q. Fill in the following blanks with suitable words:
(a) The particle which is formed by the gain of electrons by an atom is called ___.
(b) The particle which is formed by the loss of electrons by an atom is called ___.
(c) The particle which is formed by the loss or gain of electrons by an atom is called ___.
(d) A potassium ion has positive charge because it contains less ___ than ___.
(e) A sulphide ion has negative charge because it contains less ___ than ___.

Q. Fill in the following blanks with suitable words :
(a) The particle which is formed by gain of electrons by an atom is called ...................
(b) The particle which is formed by the loss of electrons by an atom is called ...................
(c) The particle which is formed by the loss or gain of electrons by an atom is called .....................
(d) A potassium ion has positive charge because it contains less .................... than ...................
(e) A sulphide ion has negative charge because it contains less ....................... than ...................

An atom that gains electrons becomes a negatively- charged ion called ______________

Q. A positively charged ion is formed by _________ electrons from an atom.

A negatively charged ion called --------------------- is formed by gaining one or more electrons by an atom.

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