HEL 10PTS Hydrogen has one proton in its nucleus but exists as three isotopes. One isotope has no neutrons, one has one neutron, and one has two neutrons. How would they be identified using isotope notation?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.