An atom has an average atomic mass of about 63.5 amu. what is the chemical symbol for the atom? consult the periodic table.
(points : 3)
pb

fe

eu

cu

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible?

What semimetal can form four single covalent bonds.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer