Chemistry, 03.02.2021 23:40 christopherschool04
Atoms of which two elements have a combined total of 23 protons?
A. Sodium, Na, and magnesium, Mg
B. Boron, B, and carbon, C
C. Copper, Cu, and zinc, Zn
D. None of these
Answers: 3
Chemistry, 22.06.2019 19:20, Lovelybunny321
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.
Answers: 1
Atoms of which two elements have a combined total of 23 protons?
A. Sodium, Na, and magnesium, Mg
Mathematics, 28.11.2021 09:10
History, 28.11.2021 09:10
Mathematics, 28.11.2021 09:10
Mathematics, 28.11.2021 09:10
English, 28.11.2021 09:10
Mathematics, 28.11.2021 09:10
Mathematics, 28.11.2021 09:10