select the correct answer.\nwhich sentence about particles in matter is true?\na. atoms are present in…

select the correct answer.\nwhich sentence about particles in matter is true?\na. atoms are present in solids and liquids but not in gases.\nb. the particles of matter are in constant motion.\nc. the same kinds of atoms are found in different elements.\nd. when a solid changes to a liquid, the sizes of the particles change.

select the correct answer.\nwhich sentence about particles in matter is true?\na. atoms are present in solids and liquids but not in gases.\nb. the particles of matter are in constant motion.\nc. the same kinds of atoms are found in different elements.\nd. when a solid changes to a liquid, the sizes of the particles change.

Answer

Brief Explanations:

  • Option A is incorrect as atoms are present in solids, liquids, and gases.
  • Option B is correct as the kinetic - molecular theory states that particles of matter are in constant motion.
  • Option C is incorrect since different elements are made of different kinds of atoms.
  • Option D is incorrect because when a solid changes to a liquid, the size of the particles remains the same, only the arrangement and energy change.

Answer:

B. The particles of matter are in constant motion.