stephanieb75
23.06.2019 •
Chemistry
What do lines in an elements line spectrum represent?
Solved
Show answers
More tips
- W Work and Career What is the Most In-Demand Profession in the Modern World?...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- H Health and Medicine What is the Normal Blood Sugar Level in a Healthy Person?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Chemistry
- C Chemistry Pesticides is it a pure substance or a mixture...
- C Chemistry Earthquakes are not easy to predict, but volcanic eruptions have more warning signals and instruments to measure those signals, therefore making them somewhat easier...
- C Chemistry How many moles of compound are there in 15.0g of potassium dichromate, k2cr2o7?...
- C Chemistry Which of the following is a way that chemistry is part of everyday life? a. using gasoline to power an automobile b. cooking food c. digesting food d. all of the above...
- C Chemistry 10 ! a pure substance cannot be composed of which of the following? a. mixture b. element c. molecule d. compound...
- C Chemistry The energy needed to completely remove a hydrogen atom from an oxygen atom is called...
- C Chemistry The octet rule is satisfied when two atoms acquire how many valence electrons...
- C Chemistry The oxidation number of chlorine in the compound pbcl2 has to be...
- C Chemistry Phosphorus pentachloride is formed when 17.2 g of chlorine gas react with 23.2 g of solid phosphorus (p2). determine the reactant that is in excess....
- C Chemistry How many total chromosomes are in each human body cell...
Ответ:
Electron transfers between energy levels.
ExplanationAn atom contains an infinite number of energy levels. An electron can exist within any one of them, but not in between. Electron can move from one level to another. However, those levels differ in energy. Energy has to conserve.
An electron loses energy when it moves to a level of lower energy. The energy is released as radiation. The frequency of the radiation depends on the energy difference. Those radiations combine to produce an emission spectrum.An electron gains energy when it moves to a level of higher energy. This transfer happens only if there's an external source of energy. For example, directing a beam of white light on the atom. The beam of light would excite the electron. Again, the frequency of the radiation depends on the energy difference. Only frequencies that corresponds to transfer will be absorbed. Those radiation will eventually be released in all directions. As a result, strength of some of the radiations will be weakened. A continuous spectrum with those frequencies weakened is an absorption spectrum.Ответ:
This stumped me for a bit, but I think the answer is that astronauts can carry dehydrated food, such as MREs, because dehydrated food can last for a long period of time.