What did ancient astronomers think areas of the moon called mares might be? mountains seas craters terrae

What three things determine the shape and size of a puddle when water is poured out onto a surface

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

Select the statement that describe chemical properties a. antacid tablets neutralize stomach acid b. helium is the lightest monatomic element c. water freezes at 0 celsius d. mercury is liquid at room temperature