Which of the following is true about compounds?' O They are physical combinations
O They have compositions that vary.
O They are pure substances.
O They have properties similar to those of their component elements.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock