The order of the elements in the periodic table is based on the .
A. number of protons in an atom of the element
B. number of neutrons in an atom of each element
C. number of electrons in an atom of each element
D. the order in which they were discovered

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

All of the following are part of the biosphere except

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