Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element. a. isotope number b. atomic number. c. atomic mass unit. d. mass number

The consumption of fossil fuels could be

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic