A hypothetical element has two main isotopes with mass numbers of 93 and 96. If 66.00% of the isotopes have a mass number of 93 amu, what atomic weight should be listed on the periodic table for this element?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table