Question

5.
Why are the elements in group 1 of periodic table called "alkali metals’? Mention the
symbol of a post-uranium element.​

Answer 1

Answer:

Alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids).

Explanation:

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Answer 2

Answer:

The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids). Uranium is a chemical element with the symbol U and atomic number 92. ... A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.