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❀Question❀

write the name of alkali metals and write the properties of elements of alkali metals.​

Answer 1

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The alkali metals are,

➝ lithium (Li)

➝ Sodium (Na)

➝ Potassium (K)

➝ Rubidium (Rb)

➝ Caesium (Cs)

➝ Francium (Fr)

$\underline{\bigstar\:\textsf{Alkali Metals}}$

»» Group 1 elements are called alkali elements

»» These are called alkali metals because they are basic in nature

»» The oxides formed by them also have a basic nature

»» The electronic configuration of alkali metals end with ns¹

»» This represents, they have single electron in their valence shell

»» Down the group, atomic size increases, nuclear attraction decreases and hence ionisation energy decreases

»» Alkali metals respond to the flame test by giving characterised color.For example lithium gives crimson red color, sodium..yellow, potassium...violet.rubidium...red violet, cesium...blue

»» Alkali metals dissolve in the solution of ammonia to form blue color solutions. This solution can conduct electricity due to the free electrons present in them. If the solution is concentrated, they form bronze color solution

Here are some of it's chemical properties,

✭ With oxygen they form oxides, peroxides and super oxides

✭ With water they form hydroxides

✭ With hydrogen, they form metal hydrides.

✭ Oxidation state of hydrogen in metal hydride is -1

✭ Alkali metals act as strong reducing nature since they easily loose an electron to form stable ion

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Answer 2

Answer:

➡️ ALKALI METALS -

The alkali metals are a group of chemical elements in the periodic table with the following physical and chemical properties:

☆. shiny.

☆. soft.

☆. silvery.

☆. highly reactive at standard temperature and pressure.

☆. readily lose their outermost electron to form cations with a charge of +1.

➡️ ALKALI METALS INCLUDES -

▪︎Lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

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