Using the partial periodic table, which statement is correct? *Oxygen (O) has more protons than chlorine (Cl).

*Iron (Fe) has more protons than silver (Ag).

*Sodium (Na) has more protons than carbon (C).

*Hydrogen (H) has more protons than helium (He).

Which of the following provides support and protection for many insects a) muscle b) skeleton c) spinal cord d) exoskeleton

As you move from right to left on the periodic table the atomic radius fill in the blank

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.