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
Pavel [41]
3 years ago
8

The electron configuration for an atom is 1s 2s 2p2. How many electrons does the atom have?

Chemistry
1 answer:
taurus [48]3 years ago
7 0

Answer:

Four  

Step-by-step explanation:

The <em>superscripts</em> in an electron configuration tell us how many electrons are in a subshell.

If the electron configuration is 1s¹ 2s¹2p², the total number of electrons is

1 + 1 + 2 = 4

The atom contains four electrons.

<em>Note</em>: this atom is in an <em>excited state</em>, because the 1s and 2s subshells can each hold one more electron.

You might be interested in
Many scientist compare the parts of a cell to the parts of a factory. Do you think this comparison is fair and useful?
Fittoniya [83]
Yes. Parts of a cell work together just like stations in a factory.
4 0
3 years ago
In the following equation, which element has been reduced?
Mila [183]
The answer is A. you sre correct!
4 0
3 years ago
Explain why you usually can't use just a single spectrum line to confirm the identity of an element
Agata [3.3K]
You can't usually just use a  single spectrum line to confirm the identity of an element because there are cases that the emission line id not clearly defined.  When the emission line is very weak compared to surrounding noise, in which case the more datapoints you have to build up confidence for the existence of a particular emission spectra, the better.
8 0
3 years ago
What type of change occurs when water changes from a solid to a liquid? *
Arlecino [84]
Melting 

Melting is a change in property of matter from solid to liquid

Matter is anything that occupies space and has mass. Thus, there are fundamentally three types of matter which is solid liquid and gas. But why do gases and liquids diffuse and not solids? It is because of the molecular structure of these components of matter. If we examine the molecular structure of gas the molecules are highly scattered and liquid has also almost the same structure as mediocrely scattered that these particles can easily slip through other substances unlike solid which is entirely intact.  <span> </span>
5 0
3 years ago
Which of the following would remain a liquid longer as temperature continues to drop?
viktelen [127]

I just took a test with this question and got the answer wrong for saying ethane. The correct answer is propane.

3 0
3 years ago
Read 2 more answers
Other questions:
  • A buffer is prepared by dissolving 0.80 moles of NH3 and 0.80 moles of NH4Cl in 1.00 L of aqueous solution. If 0.10 mol of NaOH
    15·1 answer
  • 1. How many grams of CuNO, are required to produce 700.0 mL of a 2.0 M CUNO,
    7·1 answer
  • Show a correct numerical setup for calculating the
    11·1 answer
  • A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
    7·1 answer
  • A 0.532 mol sample of SO2 gas requires 52.3 s to effuse through a tiny hole. Under the same conditions, how long will it take 0.
    12·1 answer
  • Should I say sorry to a boy who was tryna steal my friends backpack as a joke and I was tryna kick his hand and I kicked his nos
    9·1 answer
  • What would you see if you were standing on the Earth's surface in the penumbra and you were looking up at the sky?
    10·2 answers
  • 5Fe2 2Mn2 8H2O2MnO4- 5Fe 16H In the above reaction, the oxidation state of iron changes from to . How many electrons are transfe
    11·1 answer
  • Please answer fast please ​
    5·1 answer
  • Characteristic ions of water: OH- and H3O+​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!