How many valence electrons are in atom of sulfur?

Which type of reaction has the highest penetration ability? Alpha Beta Gamma Nuclear

Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3) with salicylic acid (C7H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2).

A scientist detected radiation escaping from a material encased in a thin metal box. What type of radiation did the scientist most likely detect?

At any given location, the physical properties of a substance do not change. a. True b. False

Which best describes the effect of J. J. Thomson's discovery? The accepted model of the atom was changed. The accepted model of the atom was supported. Cathode ray tubes were no longer used in experiments due to poor results.

Which of these is a property of bases? They produce hydrogen gas when reacted with metals. They turn litmus paper blue. They feel sticky. They taste sour.

After Pangaea broke up, North America became part of what?

What the different betwen observe and reference

How many moles are in 12.5 g of H2O

How do the atomic number and the number of protons relate to one another? The atomic number tells us the number of protons The atomic number is protons + neutrons They do not Electron Cloud