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Chapter 3: Problem 117

(a) The elements in group IA (1) are called (b) The elements in group IIA (2) are called (c) The elements in group VIIA(17) are called (d) The elements in group VIIIA (18) are called

Short Answer

Expert verified
(a) Alkali metals (b) Alkaline earth metals (c) Halogens (d) Noble gases

Step by step solution

01

Identify the Name of the Group 1 Elements

Group 1 elements in the periodic table are called alkali metals. These elements have one electron in their outermost shell, making them highly reactive.
02

Identify the Name of the Group 2 Elements

Group 2 elements in the periodic table are called alkaline earth metals. These elements have two electrons in their outermost shell, which makes them less reactive compared to alkali metals but still fairly reactive.
03

Identify the Name of the Group 17 Elements

Group 17 elements in the periodic table are called halogens. These elements have seven electrons in their outermost shell and require one electron to complete their valence shell. They are highly reactive and often found in nature as salts.
04

Identify the Name of the Group 18 Elements

Group 18 elements in the periodic table are called noble gases. These elements have a full valence shell and are very stable and non-reactive. So, here are the answers to the specific questions: (a) The elements in group IA (1) are called alkali metals. (b) The elements in group IIA (2) are called alkaline earth metals. (c) The elements in group VIIA(17) are called halogens. (d) The elements in group VIIIA (18) are called noble gases.

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