Why do electrons stay outside the nucleus?

Why do electrons stay outside the nucleus?

Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus. This force of attraction keeps electrons constantly moving through the otherwise empty space around the nucleus.

How long do viruses last?

In general, viruses are not likely to be a danger on surfaces very long. In fact, while cold viruses can live for several days, their ability to cause infection decreases after approximately 24 hours, and after only five minutes, the amount of flu virus on hands fall to low levels, making transmission much less likely.

Is a germ a virus?

The term “germs” refers to the microscopic bacteria, viruses, fungi, and protozoa that can cause disease. Washing hands well and often is the best way to prevent germs from leading to infections and sickness.

How much bigger is bacteria than a virus?

Size. Bacteria are giants when compared to viruses. The smallest bacteria are about 0.4 micron (one millionth of a meter) in diameter while viruses range in size from 0.02 to 0.25 micron. This makes most viruses submicroscopic, unable to be seen in an ordinary light microscope.

Which treatment is best for bacterial infections?

Bacterial infections are treated with antibiotics such as amoxicillin, erythromycin and ciprofloxacin. There are many different types of antibiotic, with different ways of working; the choice depends on the type of infection you have. Fungi commonly cause skin infections such as athlete’s foot and ringworm.

How do you tell if it’s bacterial or viral?

Diagnosis of Bacterial and Viral Infections But your doctor may be able to determine the cause by listening to your medical history and doing a physical exam. If necessary, they also can order a blood or urine test to help confirm a diagnosis, or a “culture test” of tissue to identify bacteria or viruses.

Can bacteria kill viruses?

Most bacteria that get infected by a virus they have never seen will die. Every so often, though, a bacterium does not die from viral infection. This might happen because of a mutation in that bacterium’s DNA.

Can a virus be killed by antibiotics?

Antibiotics cannot kill viruses or help you feel better when you have a virus. Bacteria cause: Most ear infections. Some sinus infections.

What eats a virus?

Teeny, single-cell creatures floating in the ocean may be the first organisms ever confirmed to eat viruses. Scientists scooped up the organisms, known as protists, from the surface waters of the Gulf of Maine and the Mediterranean Sea off the coast of Catalonia, Spain.

Are viruses worse than bacteria?

Viral infections need a host to survive and they multiply by attaching to cells. Viruses are more dangerous than bacteria as they do cause diseases. In some infections, like pneumonia and diarrhea, it’s difficult to determine whether it was caused by bacteria or a virus and testing may be required.

What viruses are contagious?

Common examples of contagious viral diseases include the flu, the common cold, HIV, and herpes. Other types of viral diseases spread through other means, such as the bite of an infected insect.

How long are you contagious for with a virus?

For colds, most individuals become contagious about a day before cold symptoms develop and remain contagious for about five to seven days. Some children may pass the flu viruses for longer than seven days (occasionally for two weeks). Colds are considered upper respiratory infections.

Why do doctors prescribe antibiotics for viral infections?

In complicated or prolonged viral infections, bacteria may invade as well, and cause what is known as a “secondary bacterial infection”. In these cases, your doctor may prescribe an antibiotic, if one is needed, to kill the specific invading bacteria.

What is the best medicine for a virus?

The drugs used for viral infection are Acyclovir (Zovirax), famciclovir (Famvir), and valacyclovir (Valtrex) are effective against herpesvirus, including herpes zoster and herpes genitalis. Drugs used for treatment for viral fever are Acetaminophen(Tylenolothers)ibuprofen (Advil,motrin IB others).

Can you get rid of a bacterial infection without antibiotics?

Even without antibiotics, most people can fight off a bacterial infection, especially if symptoms are mild. About 70 percent of the time, symptoms of acute bacterial sinus infections go away within two weeks without antibiotics.

Why do doctors not recommend taking an antibiotic when you have a cold virus?

Because they hide in your cells, antibiotics aren’t able to affect viruses in the same way. Taking antibiotics for a virus is potentially dangerous. Although antibiotics kill both good and bad bacteria, they can miss bacteria like Clostridium difficile (C-diff).

Which antibiotic is best for common cold?

Never take antibiotics to treat colds and flu. To ease the discomfort from specific cold and flu symptoms, consider using the following types of OTC medicines: To reduce fever and pain — analgesics: Acetaminophen (Tylenol®) is generally preferred. Ibuprofen (Advil®) or naproxen (Naprosyn®) is also commonly used.

Why do antibiotics not work against viruses quizlet?

Taking too many antibiotic drugs can cause your body to develop a resistance to the drugs. Why do antibiotic drugs not work against viruses? Antibiotic drugs attack the parts of bacteria that viruses do not have, such as a cell wall. Since viruses do not have a cell wall, the antibiotic cannot affect it.

Which antibiotic is good for throat infection?

Doctors most often prescribe penicillin or amoxicillin (Amoxil) to treat strep throat. They are the top choices because they’re safer, inexpensive, and they work well on strep bacteria.