What is a molecule called when it has more than one element? atom cell compound organ

What is the mass of the same rock on the earth

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.