Which two elements have the same number of valence electrons? ALSO. THIS IS A PART OF MY FINALS. Elements and Their Atomic Numbers

Element Atomic Number

barium 56

neon 10

silicon 14

carbon 6

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?