Marcus knows that sodium is found in group 1, period 3 on the periodic. where should he look to find another element that has similar properties to those of sodium?
Marcus should look for elements in the same group as sodium, which is group 1 (also known as the alkali metals). Some other elements in group 1 that have similar properties to sodium include lithium (Li), potassium (K), rubidium (Rb), and cesium (Cs).
