Question

04. What is the number of valence electrons ?
1. Alkali metals →
2. Alkaline earth metals
3. Halogens →
4. Zero group elements →​

Answer 1

What is the number of valence electrons ?

1. Lithium has 3 protons and 1 valence electron. Sodium has 11 protons and 1 valence electron

1. alkali metals →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 reactive that they are generally found in nature combined with other elements...

2. Alkaline earth metals→Beryllium

The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

3. Halogens →The halogens are a group in the periodic table consisting of five chemically related elements: fluorine, chlorine, bromine, iodine (I), and astatine. The artificially created element 117, tennessine, may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17.

4. Zero group elements →All of the elements in Group Zero are noble gases. The list includes helium, neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Don't think that, because these elements don't like to react, we don't use them. You will find noble gases all over our world.

Answer 2

Answer:

1: Alkali metals have 1 balance electron.

2:Alkaline earth metals have 2 balance electron.

3:Halogens have seven balance electron

4:Zero group elements have 8 ( octet ) balance electrons except helium which have only 2 ( duplet ) electrons in the outermost shell.

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