Select all the words that apply to particle diagram A in the picture. (PICK TWO) Elements
a sample of a mixture
a pure substance sample
Compounds
Pure substance

Need on both questionswill markbr />

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume