1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mezya [45]
2 years ago
11

If an atom has 15 electrons, how many electrons are in the n=1 energy level?

Biology
1 answer:
IRISSAK [1]2 years ago
7 0

Answer:

In the n=1 energy level, the atom has 2 electrons

Explanation:

Electrons orbit the nucleus of an atom in multiple rings (energy levels). The first ring of the electron can only hold 2 electrons. After that, electrons are added to the second ring. Excluding the first ring, all other rings can hold a maximum of 8 electrons.

For example, Oxygen is an atom with 6 electrons. The first energy level contains 2 electrons, and the second energy level contains 4 electrons. The second energy level has room for up to 4 more electrons.

In your example of an atom with 15 electrons, there would be 2 electrons in the first ring, 8 electrons in the second ring, and 5 electrons in the third and final ring.

To summarize, all atoms have a first energy level containing 2 electrons, and all other energy levels can contain 8 electrons. This is true no matter the number of electrons.

You might be interested in
Why are some pathogenic bacteria able to make toxins?
Angelina_Jolie [31]
A pathogen is a microorganism that is able to cause disease in a plant, animal or insect. Pathogenicity is the ability to produce disease in a host organism. Microbes express their pathogenicity by means of their virulence, a term which refers to the degree of pathogenicity of the microbe. Hence, the determinants of virulence of a pathogen are any of its genetic or biochemical or structural features that enable it to produce disease in a host.

The relationship between a host and a pathogen is dynamic, since each modifies the activities and functions of the other. The outcome of such a relationship depends on the virulence of the pathogen and the relative degree of resistance or susceptibility of the host, due mainly to the effectiveness of the host defense mechanisms. Staphylococcus aureus, arguably the most prevalent pathogen of humans, may cause up to one third of all bacterial diseases ranging from boils and pimples to food poisoning, to septicemia and toxic shock. Electron micrograph from Visuals Unlimited, with permission.

The Underlying Mechanisms of Bacterial Pathogenicity

Two broad qualities of pathogenic bacteria underlie the means by which they cause disease:
1. Invasiveness is the ability to invade tissues. It encompasses mechanisms for colonization (adherence and initial multiplication), production of extracellular substances which facilitate invasion (invasins) and ability to bypass or overcome host defense mechanisms.

2. Toxigenesis is the ability to produce toxins. Bacteria may produce two types of toxins called exotoxins and endotoxins. Exotoxins are released from bacterial cells and may act at tissue sites removed from the site of bacterial growth. Endotoxins are cell-associated substance. (In a classic sense, the term endotoxin refers to the lipopolysaccharide component of the outer membrane of Gram-negative bacteria). However, endotoxins may be released from growing bacterial cells and cells that are lysed as a result of effective host defense (e.g. lysozyme) or the activities of certain antibiotics (e.g. penicillins and cephalosporins). Hence, bacterial toxins, both soluble and cell-associated, may be transported by blood and lymph and cause cytotoxic effects at tissue sites remote from the original point of invasion or growth. Some bacterial toxins may also act at the site of colonization and play a role in invasion. Acid-fast stain of Mycobacterium tuberculosis, the agent of tuberculosis (TB). The bacteria are the small pink-staining rods. More than one-third of the world population is infected. The organism has caused more human deaths than any other bacterium in the history of mankind. Although its ability to produce disease is multifactorial, it is not completely understood. American Society of Microbiology, with permission.
6 0
2 years ago
Autoimmune diseases occur when the immune system fails to recognize and tolerate ____________ antigens.
Dahasolnce [82]

Answer:

Harmful

Explanation:

When you have an autoimmune disorder, your immune system does not distinguish between healthy tissue and potentially harmful antigens.

6 0
2 years ago
If the DNA sequence is AAG TCG. What is the RNA complimentary sequence?
Helen [10]

Answer:

Complementary RNA (cRNA) is a copy of a strand of RNA that will bind to the appropriate region of the original molecule. If the original RNA stand had a base sequence of AUU, for example, the sequence of the cRNA strand would be UAA.

Hope it helps.

have a wonderful day!

8 0
3 years ago
Carine went to the doctor for a physical. Her blood pressure was 80/50. What describes Carine’s condition, and what is the most
Korolek [52]

Hello!! Since there is no mention of weight in the question, I would assume that she is pregnant. Whenever someone's blood pressure is low, it is referred to hypotension. Whenever someone's blood pressure is high, it is referred to hypertension. I would say your best answer is A - She has hypotension because she is pregnant. I hope that is the right answer you are looking for. Have a great day!! :)

3 0
3 years ago
Read 2 more answers
HELP NEEDED PLEASE!!
emmasim [6.3K]

Answer:

B

Explanation:

Nerve cells can carry signals and connect all parts of the body to the brain

3 0
3 years ago
Other questions:
  • What are the conditions needed to create a mechanical wave?
    14·1 answer
  • What is the relationship between science and pseudoscience
    15·1 answer
  • In what process are carbon membranes being used instead of fine particle filtration? 1. air pollution sulfur particulate collect
    10·1 answer
  • 10. Sexual reproduction is believed to have
    7·1 answer
  • You are with a person who is responsive and showing signs and symptoms of a life threatening condition
    14·1 answer
  • What is the force of attraction that objects have due to their<br> mass?
    15·1 answer
  • What human activity contributes to air pollution?
    6·2 answers
  • What is the structure inside of the nucleus called and the name of the phase of the
    9·1 answer
  • An earthquake’s magnitude is a measure of the _____.
    9·1 answer
  • Do the physical characteristics given identify characteristics of the Sun, Earth, or Moon?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!