What happens when an electron moves from a high energy level to a lower one? it absorbs light it emits light it disappears it gets bigger

Which of the following elements has the fewest valence electrons?. a. beryllium. b. boron. c. carbon. d. lithium

Mizar is a star system that is composed of two pairs of stars, mizar A and mizar B, or four stars in total. What do astronomers call a system that is composed of more than two starts?

The catalytic decomposition of hydrogen peroxide yields oxygen gas and water, according to the reaction given below. In an experiment, the decomposition of hydrogen peroxide yielded 75.3 mL of gas collected over water at 25°C and 0.976 atm.

1.) Where is carbon mostly located?

Compare two electrons with quantum number sets (4, 2, 1, + ½) and (4, 1, 1, + ½). Be specific about each in terms of location and properties, based on their four quantum numbers.

What is the general form for the simplest type of acid-base reaction?

Which element has a larger atomic radius than sulfur? chlorine cadmium fluorine oxygen

Which of the following procedures is used when refining petroleum? Increase the temperature of the oil. Decrease the temperature of the oil. Increase the pressure of the oil. Decrease the pressure of the oil.

What is the mass of calcium in 2.3•10^23 molecules of calcium phosphate

How many metaloides are found on the periodic table