Question

Sodium (Na) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence electrons does potassium have?

0

1

9

11

Answer 1

Answer: The correct answer is 1.

Step-by-step explanation:

Valence electrons are defined as the electrons that are present in the outermost shell of an atom.

Sodium is the 11th element in the periodic table. the number of electrons in this element are 11.

The electronic configuration of this element is
`1s^22s^22p^63s^1`

Valence shell of this element is 3s and number of electrons present in this shell is 1.

Hence, the correct answer is 1.

Answer 2

The correct answer is

1

Potassium has 1 valence electron. In fact, it is in the same group of sodium in the periodic table. But sodium has 1 valence electron, since it is in the 11th position, because the first two elements of the periodic table fills the first orbital, while the elements from 3 to 10 fill the second orbital (made of 8 electrons), so the 11th element (sodium) has 1 valence electron.