Going down group 1, the melting point decreases ... quickly becomes smaller until it disappears Potassium, K Burns violently with sparks and a lilac flame; quickly melts to form a ball; disappears ...

They include lithium, sodium and potassium, and are placed in the first vertical column on the left of the periodic table. All the Group 1 elements are very reactive, and all react with water to ...

Muscle biopsy taken during a spontaneous attack in which the serum potassium fell to 3.1 mEq per liter demonstrated central single vacuoles in many fibers. Distribution of Attacks of Periodic ...