SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Magnesium
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Iron
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Sodium
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Europium
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Detailed explanation-1: -Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Detailed explanation-2: -The valence electron of Lithium, Sodium, and Potassium is same, i.e. . Hence, they belong to the same group. All of these elements undergo a chemical reaction with water and results in the formation of an alkali. Therefore, they are known as alkali metals.
Detailed explanation-3: -The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
Detailed explanation-4: -Bases which are soluble in water are called alkalis.
Detailed explanation-5: -Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na. The free metal does not occur in nature, and must be prepared from compounds. Sodium is the sixth most abundant element in the Earth’s crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl).