Which part of John Dalton’s theory was disproved by J. J. Thomson’s cathode-ray tube experiments?(1 point) Atoms can form new substances.

Atoms are indivisible.

Atoms are small.

Atoms can join together.

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as