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
andrew-mc [135]
3 years ago
9

Cobalt, Co, has 27 electrons. Write out the entire electron configuration for cobalt using spdf notation.

Chemistry
1 answer:
Hatshy [7]3 years ago
8 0

Answer:

Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7

Explanation:

Number of electrons = 27

The closest noble gas before cobalt is Argon and argon has 18 electrons.

Co = [Ar]  ; Remains 27 - 18 = 9  more electrons to fill.

The next orbital in order of increasing energy is the 4s orbital. However it can only hold a maximum of 2 electrons.

We have;

Co = [Ar] 4s2; Remains 27 - 20 = 7 more electrons to fill.

The next orbital in order of increasing energy is the 3d orbital. It can have a maximum of 10 electrons.

So we have;

Co = [Ar] 4s2 3d7

The electronic configuration of Ar = 1s2 2s2 2p6 3s2 3p6

This means the entire configuration of cobalt is;

Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7

You might be interested in
In which reaction is a precipitation occurring
iogann1982 [59]

It is reacting as a chemical reaction .

6 0
3 years ago
a substance is analyzed to have a percent composition of 74.186% sodium and 25.814% fluorine. calculate the empirical formula
Novosadov [1.4K]

Answer:

Na₂₆F₁₁

Explanation:

We find the moles of the substance assuming 100 g of the substance is present. Why do we take 100 g? Because then the percent of sodium/fluorine, would be the g of sodium/fluorine respectively:

74.186 g Sodium | 1 mol Sodium/23 g              =>       3.2255 mol Na    

25.814 g Fluorine | 1 mol Fluorine/19 g             =>       1.3586 mol F

Divide each by smallest number of moles:

3.2255/1.3586 = 2.37

1.3586/1.3586 = 1

Multiply by common number to get a smallest whole number:

2.37*11 = 26,

1*11 = 11

The empirical formula is Na₂₆F₁₁

5 0
3 years ago
Help please hurry lots of points
andrey2020 [161]
I think ionic hope it helps
7 0
3 years ago
What are the two main reasons why most metals are more dense than most plastic and wood?
Viktor [21]

Answer:

Most common metals like aluminum, copper, and iron are denser than wood. The atoms that makeup metals are generally heavier than the atoms in plastic and wood and they are packed closer together.

3 0
3 years ago
When molecules collide with the walls of their container, is exerted
evablogger [386]
I believe your answer would be friction...
8 0
3 years ago
Read 2 more answers
Other questions:
  • Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in humans. The value of ΔHc
    8·1 answer
  • The matter that travels through a wave is called the what of a wave?
    12·1 answer
  • What do Nitrogen, Chlorine and Florine have in common.
    12·2 answers
  • What type of energy travels through space as waves?
    14·2 answers
  • Which term names the group of organisms able to interbreed and produce fertile offspring?
    10·1 answer
  • How many moles are in 88.1 of magnesium
    9·1 answer
  • What is the concentration of 10.00 mL of HBr if it takes 16.73 mL of a 0.253 M LiOH solution to neutralize it?
    14·1 answer
  • When convex mirrors are used for security purposes, the images they form
    9·1 answer
  • 3.04 Quiz: Chemical Reactions 1 to 10 question
    13·1 answer
  • What is neutron number for calcium ​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!