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Identify the lightest member of each of the following groups:

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

User Milo Chen
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1 Answer

4 votes

Final answer:

The lightest members of the alkali metals, alkaline earth metals, halogens, and noble gases are lithium, beryllium, fluorine, and helium respectively, based on their atomic numbers.

Step-by-step explanation:

Using the periodic table, we can identify the lightest member of each of the following groups:

  • (a) Alkali metals: The lightest alkali metal is lithium (Li) with an atomic number of 3.
  • (b) Alkaline earth metals: The lightest alkaline earth metal is beryllium (Be) with an atomic number of 4.
  • (c) Halogens: The lightest halogen is fluorine (F) with an atomic number of 9.
  • (d) Noble gases: The lightest noble gas is helium (He) with an atomic number of 2.
User Xproph
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