QuestionIdentify the element that is NOT an alkali or alkaline earth metal: A) $\mathrm{Ra}$ B) $\mathrm{Cs}$ C) $\mathrm{Sc}$ D) $\mathrm{Be}$ E) $\mathrm{Rb}$

Studdy Solution

STEP 1

Assumptions1. The alkali metals include the elements in Group1 of the periodic table lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). . The alkaline earth metals include the elements in Group of the periodic table beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
3. The elements are represented by their chemical symbols Ra for radium, Cs for cesium, Sc for scandium, Be for beryllium, and Rb for rubidium.

STEP 2

Check if each of the given elements belongs to either the alkali metals or the alkaline earth metals.
A) $\mathrm{Ra}$ is an alkaline earth metal. B) $\mathrm{Cs}$ is an alkali metal. C) $\mathrm{Sc}$ is not an alkali or alkaline earth metal, it is a transition metal. ) $\mathrm{Be}$ is an alkaline earth metal. ) $\mathrm{Rb}$ is an alkali metal.
Therefore, the element that is NOT an alkali or alkaline earth element is $\mathrm{Sc}$ (scandium).

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