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
beks73 [17]
1 year ago
9

An atom has the following electron configuration. 1s22s22p63s23p64s? How many valence electrons does this atom have? A: 2B: 3C:

5D: 11
Chemistry
1 answer:
Katena32 [7]1 year ago
3 0

ANSWER

2 valence electrons

STEP-BY-STEP EXPLANATION:

The electronic configuration is given below as

1s^22s^22p^62s^23p^64s^2

Looking at the configuration, you will see that the last energy carries 2 electrons

Hence, the valence electrons are 2

You might be interested in
Whoever can answer these for me gets 100 points
tiny-mole [99]

Answer:

The electrons that whiz about outside the nucleus have a negative charge. They are held in the atom by the positive charge of the nucleus. ... An atom that gains or loses an electron becomes an ion. If it gains a negative electron, it becomes a negative ion.

Explanation:

Hope this helped!...

3 0
3 years ago
Read 2 more answers
How many moles of each reactant are needed to produce 3.60 x 10^2g ch3oh
zysi [14]
Methanol is prepared by reacting Carbon monoxide and Hydrogen gas,

                                   CO  +  2 H₂    →    CH₃OH

Calculating Moles of CO:
                                       According to equation,

             32 g (1 mole) of CH₃OH is produced by  =  1 Mole of CO
So,
             3.60 × 10² g of CH₃OH is produced by  =  X Moles of CO

Solving for X,
                       X  =  (3.60 × 10² g × 1 Mole) ÷ 32 g

                       X  =  11.25 Moles of CO

Calculating Moles of H₂:
                                       According to equation,

             32 g (1 mole) of CH₃OH is produced by  =  2 Mole of H₂
So,
             3.60 × 10² g of CH₃OH is produced by  =  X Moles of H₂

Solving for X,
                       X  =  (3.60 × 10² g × 2 Mole) ÷ 32 g

                       X  =  22.5 Moles of H₂

Result:
            3.60 × 10² g of CH₃OH
is produced by reacting 11.25 Moles of CO and 22.5 Moles of H₂.
3 0
4 years ago
What is an example of a molecular compound
Arte-miy333 [17]

Answer:

Molecular compounds are inorganic compounds that take the form of discrete (covalent) molecules. Examples include such familiar substances as water (H2O) and carbon dioxide (CO2).

6 0
3 years ago
In the reaction shown above , the?
matrenka [14]

Answer:

I think option (d) is right answer

8 0
3 years ago
Antoine put some metal into a container with air. He closed the container. He measured the weight of the closed container with t
Mandarinka [93]

Answer:

the same

Explanation:

due to the law of conservation of mass, the mass will not change

7 0
3 years ago
Other questions:
  • The wavelength of a light wave can be used to measure which of the following?
    12·1 answer
  • plez hurry Which is an important safety precaution that should be taken during a tornado? Stay away from doors and windows. Move
    11·2 answers
  • True or false adding a solute to a solvent will raise the freezing point of the solvent.
    11·1 answer
  • Description of horizon a
    6·1 answer
  • . A mixture of methane and air is capable of being ignited only if the mole percent of methane is between 5% and 15%. A mixture
    13·1 answer
  • What does 2,3-dibromopentane look like?
    13·1 answer
  • What is the mass of 0.78 mol Mg(NO3),? Make sure to round to the correct number of sig figs and to include the unit in your fina
    11·1 answer
  • Hydrogen iodide can decompose into hydrogen and iodine gases. 2HI(g) H2(g) I2(g) K for the reaction is 0.016. Of 0.148 atm of HI
    14·1 answer
  • What is The particle in the nucleus of an atom that has the same mass of protons but no net charge
    12·1 answer
  • Which of the following is NOT true about the exothermic reaction?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!