Apolar covenant bond is likely to form between two atoms that
a.) are similar in electronegativity
b.) are of similar size
c.) differ in electronegativity
d.) have the same number of electrons

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?