How many valence electrons does magnesium (Mg) have? Ο Α. 12
B. Six
O C. three
O D. two

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

Me with biology endocrine system crossword also image left i need with hw