Question : Which of the following statements is not correct regarding the alkali metals?
Option 1: All the alkali metals are silvery white, soft and light metals.
Option 2: The ionisation enthalpies of the alkali metals are considerably low and decrease down the group.
Option 3: Group 1 metals are known as alkali metals.
Option 4: All the alkali metals have two valence electrons.
Correct Answer: All the alkali metals have two valence electrons.
Solution : The incorrect statement is All the alkali metals have two valence electrons .
Group 1 of the periodic table comprises all alkali metals, which have a single valence electron. Electrons in the atom's outermost orbit are known as valence electrons. Group 1 of the periodic table contains the alkali metals hydrogen (H), lithium (Li), sodium (Na), potassium (K), caesium (Cs), rubidium (Rb), and francium (Fr).
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