Question

1. the elements in group 1a (group 1) of the periodic table are called the

a) halogens.
b) alkali metals.
c) alkaline earth metals.
d) noble gases.

Explanation:

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<reasoning>

Identify the group name for Group 1A (Group 1)

Group 1A (Group 1) elements (excluding hydrogen) are known as the alkali metals.

Evaluate the given options

• Halogens: Group 7A (Group 17)
• Alkali metals: Group 1A (Group 1)
• Alkaline earth metals: Group 2A (Group 2)
• Noble gases: Group 8A (Group 18)

</reasoning>

<answer>
<mcq-option>A) halogens.</mcq-option>
<mcq-correct>B) alkali metals.</mcq-correct>
<mcq-option>C) alkaline earth metals.</mcq-option>
<mcq-option>D) noble gases.</mcq-option>
</answer>

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Answer:

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<reasoning>

Identify the group name for Group 1A (Group 1)

Group 1A (Group 1) elements (excluding hydrogen) are known as the alkali metals.

Evaluate the given options

• Halogens: Group 7A (Group 17)
• Alkali metals: Group 1A (Group 1)
• Alkaline earth metals: Group 2A (Group 2)
• Noble gases: Group 8A (Group 18)

</reasoning>

<answer>
<mcq-option>A) halogens.</mcq-option>
<mcq-correct>B) alkali metals.</mcq-correct>
<mcq-option>C) alkaline earth metals.</mcq-option>
<mcq-option>D) noble gases.</mcq-option>
</answer>

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