What happens when an electron moves from a high energy level to a lower one?

A. it absorbs light

B. it emits light

C. it disappears

D. it gets bigger

The solar wind carries mass away from the Sun at a rate of about 1.5 million tons per second (1 ton = 1000 kg). At this rate, how many years would it take for all of the Sun's mass to escape?

Ira is working in a lab with a unknown solution. When he inserts the electrical conductivity tester in the unknown, the bulb begins to glow brightly. Which of these would BEST describe the unknown liquid?

How much energy in joules does it take to raise the temperature of 255g of water by 12.5C

How can we determine which compound was present in a container labelled KNO3 or K2CO3 or KNO2?

3. Predict the mass of Na2S2O3that could be produced from 38.2 g of Na2S and unlimited quantities of the other reactants, based on the following unbalanced equation: Na2CO3 + Na2S + SO2--> Na2S2O3 + CO2 a. If the procedure produced only a 68.

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.

Why is it is difficult to compress a liquid? a. liquid takes the shape of its container. b. the liquid particles flow away when compressed. c. liquid becomes solid when compressed. d. the liquid particles are very close together.

A mixture of two compounds, a and b, was separated by extraction. after the compounds were dried, their masses were found to be: 105 mg of compound a and 91 mg of compound b. both compounds were recrystallized and weighed again.