Which of the following is not true about compounds?
compounds are combinations of elements that join in specific ratios.
a specific compound always has the same mass ratio of its components.
elements can combine in any proportion to form a compound.
different mass ratios of components mean different compounds.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset