Which is a component of John Dalton’s atomic theory? The ratio of atoms in a compound is fixed. The atoms of different elements are the same. An atom is a small particle of matter that can be broken down. A reaction can create or destroy atoms as well as rearrange them.

How do forces between particles in gases compare to forces in the other states of matter? o a. the forces in gases are stronger than forces in solids but weaker than forces in liquids. o b. the forces in gases are weaker than forces in solids but stronger than forces in liquids. o c. the forces in gases are weaker than forces in solids and liquids. o d. the forces in gases are stronger than forces in solids and liquids. submit

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Why is the melting of ice a physical change ?