Question

How many valence electrons are on one atom of potassium ?​

Answer 1

There is only 1 valence electron on one atom of potassium .

• With reference to the periodic table, we can find the atomic number of potassium is 19 . It means it has 19 protons . Since it's a neutral atom of potassium so number of protons will be equal to number of electrons . That is 19 .
• The electronic configuration of neutral potassium atom will be 2, 8, 8, 1 .
• The total number of electrons present in the valence shell of an atom (outermost) are called valence electrons . Thus , potassium has only 1 valence electron .