an Es Fm Md No 1. All of the following are true except a) An ion has a positive

Question

an Es Fm Md No 1. All of the following are true except a) An ion has a positive or negative charge b) Metals tend to form positive ions c) Ions are formed by adding electrons to a neutral atom d) lons are formed by changing the number of neutrons in an atom's nucleus. e) Ions are formed by removing electrons from a neutral atom 2. Which one of the following statements about atomic structure is false? a) The electrons occupy a very large volume compared to the nucleus b) Almost all of the mass of the atom is concentrated in the nucleus c) The number of protons and neutr d) Electrons are in quantized energy levels e) The protons and neutrons in the nucleus are very tightly packed ons is always equal for all atoms of an element

Explanation / Answer

1)option d is wrong explanation: Ions  are electrically charged particles formed when atoms lose or gain electrons. They have the same electronic structures as noble gases. Metal atoms form positive ions , while non-metal atoms form negative ions. But by changing the neurons number does not help for formation of ions. 2) option c is the answer explanation: because up to atomic number 20 the elements have equal number of protons and neutrons but after that there is change in number of neutrons which will be more in number compared to protons.

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