What isotope has 25 protons and 17 neutrons

Craters visible on the moon's surface provide further evidence of A) frequent asteroid impacts. B) periodic volcanic eruptions. C) frequent landings of spacecraft. D) the long-ago presence of ice on the moon.

Is H2O considered a molecule or a compound?

Which statement describes one characteristic of an operating electrolytic cell? (1) It produces electrical energy. (2) It requires an external energy source. (3) It uses radioactive nuclides. (4) It undergoes a spontaneous redox reaction.

Why is the atomic mass of many elements not a whole number? a. elements are unstable. b. an element may have isotopes with different numbers of neutrons. c. the atomic mass includes all the electrons. d. isotopes are always expressed in decimals.

Why isn't pure copper used for bells instead of bronze?

In a closed system, if a gas is transported to a container with double the volume of the previous container, gas was held in, What is the gases' new volume?

Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying? carbohydrate protein nucleic acid lipid

The function of most proteins depends primarily on the

Compare the temperature of water as ice begins to form with the temperature of ice as it begins to melt?

Which elements are present in sugars?