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
ratelena [41]
3 years ago
11

Which element contains one set of paired and three unpaired electrons in its fourth and outer main energy level? ​

Chemistry
1 answer:
Natasha2012 [34]3 years ago
4 0

Explanation:

Phosphorus (P) because of the 5 valence electrons total, 3 of them are in the 3p sublevel, and according to Hund's rule, they "single-fill" each orbital first.

You might be interested in
Convert 18g of Li into atoms.
gizmo_the_mogwai [7]
The full decimal is 2.59328...
When you round up the answer is 2.6 atoms of Li
8 0
2 years ago
Man's scientific theories are often in correct because his knowledge is​
Alik [6]

Answer:

Incomplete  

Explanation:

I wouldn't say that a scientific theory is wrong.

It is the best we have at the time, based on all available knowledge .

As each new discovery is made, scientists modify the theory to fit the new knowledge.

The scientific method is a never-ending process.

8 0
2 years ago
Find [H+] of a 0.056 M hydrofluoric acid solution. Ka = 1.45 x 10-7
brilliants [131]

Answer:  [H^+] of 0.056 M HF solution is 8.96\times 10^{-5}

Explanation:

HF\rightarrow H^+F^-

 cM              0             0

c-c\alpha        c\alpha          c\alpha  

So dissociation constant will be:

K_a=\frac{(c\alpha)^{2}}{c-c\alpha}

Give c= 0.056 M and \alpha = ?

K_a=1.45\times 10^{-7}

Putting in the values we get:

1.45\times 10^{-7}=\frac{(0.056\times \alpha)^2}{(0.056-0.056\times \alpha)}

(\alpha)=0.0016

[H^+]=c\times \alpha

[H^+]=0.056\times 0.0016=8.96\times 10^{-5}  

Thus [H^+] of 0.056 M HF solution is 8.96\times 10^{-5}

8 0
3 years ago
Which list of elements consists of a metal, a metalloid, and a nonmetal?
Anna007 [38]
C. Sn (tin) is a metal, Si (silicon) is a metalloid, and C (carbon) is a nonmetal
4 0
3 years ago
Read 2 more answers
Spray of small droplets in a gas is called
ziro4ka [17]
Gasses is the one because gas and gasses
5 0
3 years ago
Other questions:
  • Argon has a mass of 2.82 grams, what is Argon's volume at STP?*
    15·1 answer
  • Which chemical is the limiting reagent for the entire series of reactions? Why?
    10·2 answers
  • Fungi exist primarily in the form of long filaments called _____.
    9·2 answers
  • Explain how deforestation can cause a disruption to the carbon cycle
    12·1 answer
  • **will mark brainliest**
    11·1 answer
  • why is nitrous oxide sedation especially useful for control of soft tissue discomfort during dental hygiene procedure
    7·1 answer
  • How many moles of HNO3 are present in 697 grams of HNO3?
    13·1 answer
  • Question 1 of 10
    6·1 answer
  • Why does the earth experience seasons?
    6·1 answer
  • An alcohol is 70.57 % C and 5.935 % H by mass. The rest is oxygen. What is the empirical formula of the alcohol?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!