On the Periodic Table of the Elements, all of the elements within Group 15 have the same number of valence electrons

energy levels

protons

neutrons

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse