Question

Electric configuration is 2, 8, 1.

a) Name the element and its alomic number.

b)In which group and period this element belongs?

c) Name any two elements which belong to the same group as above.​

Answer 1

Answer:

Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements.

Answer 2

Answer:

1.sodium Na atomic number 11

2.it belongs to 1st A group or 1st group

3.potassium(k)and rubidium(Rb)

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