How does one determine the number of core electrons an atom has?

True or false: a small stone and a large boulder, each of which has a surface temperature of 35 degrees celsius, contain the same amount of heat.

A sample of a compound containing C, O, and silver (Ag) weighed 1.372 g. On analysis, it was found to contain 0.288 g O and 0.974 g Ag. The molar mass of the compound was determined to be 308.8 g/mol. What is the molecular formula of the compound?

What did Robert Boyle teach in the 1600s?

Lewis structure for 2O2 I'm okay with making lewis structures where there will be one 'thing' in the middle but in 2O2 I'm unsure because there are 2 oxygen's in the middle but is there an oxygen on either side or on top of the middle oxygen's?

Marine organisms that are well adapted to drastic changes in salinity would most likely be found in which environment? a. Hydrothermal vent b. Estuary c. Open ocean d. Deep ocean

DDT is: A. banned in the United States B. still being used in other countries C. to blame for the near extinction of some bird species D. all of the above

7) Sodium is much more apt to exist as a cation than chlorine because: a) chlorine is a gas and sodium is a solid b) chlorine has a greater electron affinity than sodium c) chlorine is bigger than sodium d) chlorine has a greater ionization energy

What's the oxidation number of cu (no3) 2

If a substance goes from the gas phase to the liquid phase, was it heated or cooled

What kind of movement is produced by each of the three types of seismic waves?