#1: what was the key characteristic by which dmitri mendeleev arranged his periodic table?

a. increasing atomic number

b. electron configuration

c. decreasing atomic number

d. increasing atomic mass

**my d. increasing atomic mass

is that right?

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

If the root word engage means “to connect with something,” what does the word disengage mean in the following sentence? he disengaged the gears by stepping on the clutch pedal. a.added more engine powerb. activated a connection to the pedalc. stalled the engined. released a connection to the pedal

Which characteristics can be used to differentiate star systems? check all that apply.