Someone plz answer ! question 10 unsaved which of the following statements about cobalt (co) and nickel (ni) is true? question 10 options: nickel atoms have more protons than cobalt atoms do. nickel has a greater average atomic mass than cobalt does. nickel and cobalt have the same number of neutrons. cobalt atoms have more electrons than nickel atoms do.

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

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.

Is 343 in the sequence -5, -2, 1, 4, 7