Unit Test Active 1 2 3 4 5 6 7 8 a This chart shows four atoms, labeled W, X, Y, and Z. These atoms can combine with each other to form molecules Which combination of atoms will form a molecul not a compound? W and x X and Y W and Z Atom W X Х Y Z Element oxygen hydrogen carbon oxygen O Y and Z

hello there the answer is d

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.