What is a pure substance that contains atoms more than one element called a. solution b. compound c. mixture d. precipitate

definitly compound just took the test

Explanation: when two atoms or elements combine there called a compound, no thanks to the person down there but i got it correct, we needd clear answers  not a 50 50 of either one to get it correct plz thank you

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.