Help me with this question please.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Compare and contrast the bohr model and the electron cloud models of the atom.

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma