What are the properties of elements when they combine to form a new compound

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Me the formula cacl2 represents the compound

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells