Respuesta :

david8644

Answer:

Li

Explanation:

The group 1 elements are the alkali elements, and they are the ones that have one valence electron int heir outer shell, along wiht them Hydrogen is also an element that has one valence electron but is not considered group 1 because it is not a solid in temperature room, but a gas and has different properties, from the options the most different from the others is litium, because it can react with the same elements than the other elements in group one, plus nitrogen in a very violent way.

Lanuel

The group 1 element that exhibits slightly different chemistry from the others is: Lithium (Li).

The chemical elements found in group 1 of the periodic table are highly electro positive metals and have a single (1) valence electron in its outermost shell.

Some examples of these chemical elements (alkali metals) are;

  • Sodium (Na).
  • Hydrogen (H).
  • Potassium (K).
  • Lithium (Li).

Li is the symbol for the chemical element referred to as Lithium.

Lithium (Li) is an alkali metal and as such it is found in group 1 of the periodic table with a single (1) valence electron in its outermost shell.

Also, the electronic configuration of Lithium (Li) is written as;

  • 1s²2s¹

As a result of the small size of Lithium (Li), it is exhibits slightly different chemistry from the others such as:

  • High melting and boiling point.
  • Harder than other alkali metals.
  • Less reactive with water and oxygen.
  • High ionization energy.

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