The element sodium (Na) occurs naturally as a light solid with a shiny, metallic appearance. When sodium is added to water, the sodium catches on fire, moves violently, and breaks the glass dish. This indicates that the properties of the elements in the same column on the periodic table as sodium(Na) have-
A. the tendency to be highly reactive
B. brittle textures which disintegrates in water
C. properties of metals and non metals
D. a full octet of eight electrons in the outer shell