Explain early attempts at organizing the elements, what Mendeleev's basis was for his organization of the elements, and how early versions of the periodic table compare with the modern version.

Titania buys a bag of fertilizers at the store.it reads 30-15-10. how much phosphorous is in the fertilizer a. 30% b. 15% c. 10%

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

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?