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
Lilit [14]
3 years ago
6

Which electron configuration represents a selenium atom in an excited state?(1) 2-7-18-6(2) 2-7-18-7(3) 2-8-18-6(4) 2-8-18-7

Chemistry
1 answer:
rosijanka [135]3 years ago
5 0
(2) 2 - 7 - 18 - 7 does, because the electron from the L shell jumped to the N shell, which requires energy.

The rest of them are either different types of atoms (different elements) or are not the excited state (ground state)
You might be interested in
Which of the following shows the abbreviation for an Sl unit of density?
lara [203]

Explanation:

ur answer okkkkkkkkkkkkkkkkll

4 0
3 years ago
Read 2 more answers
An aqueous HCL solution has a proton concentration equal to 6.00 mol/L. The HCL concentration in this solution is ————M.
Harman [31]

Answer:

HCl conc.= 6.0mol/L

Explanation:

From the dissociation of HCl= 1 mole H+ and 1mol Cl-, which is equivalent stoichiometrically in concentration to that of 1 mol HCl,

4 0
3 years ago
Why do atoms share electrons in covalent bonds??
ra1l [238]
Atoms in covalent bonds do combine so as to be stable. As covalent bond consist non metals e.g O2 in this example each atom has vacance of 2 orbitals/ electrons so shairing electrons result their stability
6 0
3 years ago
Read 2 more answers
Which is the next logical step in balancing the given equation? 3CO(g) + Fe2O3(s) Fe(s) + 3CO2(g)
Elena-2011 [213]

I believe that the answer is A.

5 0
3 years ago
Read 2 more answers
What are oil and waters properties of matter?
yulyashka [42]

Answer:

Two other beneficial properties of the oil include the inhibition of corrosion of metal surfaces, such as steel, and the removal of dirt and detritus via detergency.

Properties of water include its chemical formula H2O, density, melting, boiling point & how one molecule of water has two hydrogen atoms covalently bonded to one oxygen atom.

4 0
3 years ago
Other questions:
  • If 140. mg of fluorine-18 is shipped at 8:00 A.M., how many milligrams of the radioisotope are still active when the sample arri
    8·2 answers
  • From the following enthalpy of reaction data and data in Appendix C, calculate ΔH∘f for CaC2(s): CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H2
    13·1 answer
  • chemist in South America claims to have discovered a new element with an atomic number of 34. An extremely rare element, it was
    12·1 answer
  • How might orange frogs change because of the red fly
    9·1 answer
  • Method to find upthrust
    14·1 answer
  • Dfine chemical reaction​
    8·1 answer
  • Pls need help now need​
    10·2 answers
  • What the answer. the correct answer ​
    8·2 answers
  • Explain why the temperature goes up as the atoms move faster.
    11·1 answer
  • Jis a colourless solid. When it is warmed with sodium hydroxide solution it
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!