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
nalin [4]
3 years ago
10

Potassium has an atomic number of 19. What is its electron configuration?

Biology
1 answer:
Ira Lisetskai [31]3 years ago
5 0

Answer:

shells 1, 2 and 3 are full and shell 4 has one electron

Explanation:

The distribution fo the electrons possessed by an atom in the shells surrounding it is termed as its electronic configuration.

According to the rules of writing the electronic configuration:

1. The first shell can be occupied by a maximum of two electrons.

2. the subsequent shells can be occupied by a maximum of 8 electrons.

3. the subsequent shells are filled only once the lower shells have been filled.

Based on these rules, the electronic configuration of potassium should be 2, 8, 8, 1. (2+8+8+1 = 19).

Thus, we can see that the first three shells are filled, and the last one has one electron left. 

You might be interested in
which of the following would be the best way to determine whether a cell belonged with Archaea or bacteria?
docker41 [41]
Hey there

the answer is

 a Archean is a single celled microorganism and has no cell nucleus  
and Bacteria <span>constitute a large </span>domain<span> of </span>prokaryotic microorganisms<span>. Typically a few </span>micrometres<span> in length, bacteria have a </span>number of shapes<span>, ranging from </span>spheres<span> to </span>rods<span> and </span><span>spirals</span> 

so im going to say D as the answer

Hopes this helps u :)  
6 0
3 years ago
What is the reason that a modern electron microscope (TEM) can resolve biological images to the subnanometer level, as opposed t
Alex Ar [27]

Answer:

C. Electron beams have much shorter wavelengths than visible light

Explanation:

A beam of electrons is used to illuminate and create magnified images of specimens in an electron microscope. The resolution of a microscope increases with a decrease in the wavelength of the light it uses for illumination. The wavelength of electrons used in the electron microscope is about 100,000 times shorter than that of visible light. Therefore electron microscopes have a resolution thousand times better than the light microscope.

8 0
3 years ago
A patient will be taking amiodarone [cordarone]. which baseline tests are necessary before this medication is started? (select a
olga55 [171]
Upon researching, I believe the choices are:

<span>A. Chest radiograph and pulmonary function tests
B. Complete blood count with differential
C. Ophthalmologic examination
D. Renal function tests
E. Thyroid function tests
</span>
Among these, the baseline tests necessary for the patient before taking the medication are: A. Chest radiograph and pulmonary function tests, C. Ophthalmologic examination, and E. Thyroid function tests. This is because Amiodarone has several possible toxic side effects. Some of these are thyroid toxicity, opthalmic effects, and pulmonary toxicity. Thus, it is necessary to first know the baseline of the patient for these systems and then checking if the results have deviated much after he/she takes the medication.  
5 0
3 years ago
Read 2 more answers
Hello, i came to say hello
stealth61 [152]

hi man how are you doing today

3 0
2 years ago
In law of conservation does the total mass of atoms change?
taurus [48]
No! matter is not created nor distroyed
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which description best fits the activity of a cell during interphase?
    10·1 answer
  • Use this new information to determine the parents' genotypes (indicated by red arrows). then calculate the probabilities that th
    12·1 answer
  • Which is A homologous chromosomes pair
    10·2 answers
  • Producers, such as those that make the foods that are shown below, make ATP during the process of photosynthesis. Where in the c
    5·2 answers
  • The HIV virion (viral particle) is a sphere that is roughly 140 nm in diameter. What particular kind of microscope is required t
    8·1 answer
  • Explain why cells are small instead of large
    9·1 answer
  • Please help me!!<br><br> There is a picture! Will mark a brainliest! :)
    5·1 answer
  • If you were to place fertilized sea urchin eggs in a hypotonic tank, what would happen to them and why?​
    10·1 answer
  • True / False Trees are known as nonrenewable resources found on Earth.
    10·1 answer
  • A group of students is measuring the number of paper bags that are brought to a recycling center in a single day.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!