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
gogolik [260]
3 years ago
11

Use the concept of electron configurations to explain why the number of valence electrons in metals tends to be less than the nu

mber in most nonmetals.
Chemistry
1 answer:
HACTEHA [7]3 years ago
3 0

Answer:

The electronic configuration uses the principle of the K,L,M,N shells to arrange electrons in the shells of elements. The K shell which is the first shell can only accommodate two electrons while the rest shells can accommodate a maximum of 8 electrons. Metals and nonmetals have atomic numbers which tells us the amount of electrons they contain in their neutral state.

For example the metal  Sodium (Na) has an atomic number of 11.The electronic configuration will be; 2,8,1 .

The non metal Chlorine has an atomic number of 17. The electron configuration will be 2,8,7

The valence shell refers to the last shell of an atom.

We can see from the electronic configurations that sodium has 1 electron in its valence shell, while chlorine has 7 electrons in its valence shell. Generally non-metals gain electrons because of the large number of electrons in their valence shell and metals lose electrons due to the fewer number of electrons in their valence shell

You might be interested in
In which type of chemical reaction due to a more reactants combined to form one product only
NeX [460]

Synthesis or a combination reaction. Two of the reactants form one final product in the end.

8 0
3 years ago
Read 2 more answers
When 0.873 grams of a protein were dissolved in 48.6 mL of solution at 15.6 degrees C, the osmotic pressure was found to be 0.06
Stels [109]

Answer:

697 g / mol

Explanation:

The osmotic pressure of a protein ( non electrolyte ) is given by:

π V= nRT where  V is the volume, n is the number of moles, R is the gas constant ( 0.08206 L·atm/Kmol ), and T is the temperature (K).

n= mass/ MW protein ⇒ MW protein = mass / n

Thus,

π V = ( mass/ MW ) RT

MW = mass x R xT/ ( π V )

mass = 0.873 g

R = 0.08206 L·atm/K·mol

T = ( 15.6 + 273 ) K= 288.6 K

π  = 0.061 atm

V = 48.6 mL = 48.6 mL x ( 1 L/ 1000 mL ) = 0.0486 L

We just need to plug our values into the aqbove equation for MW:

MW = 0.873 g x 0.08205 L· atm /K·mol x 288.6 K / ( 0.061 atm x0.0486 L )

       = 697 g/mol

6 0
3 years ago
If you have two peaks in your gas chromatograph, how many compounds are in your sample?
3241004551 [841]

Answer:

Two compounds.

Explanation:

If you have two peaks in your gas chromatograph, this means that you have two compounds.

The gas chromatograph is an instrument that helps identify how many compounds a substance has by observing its behavior against a solid medium through adsorption and the velocity of each compound in it.

7 0
3 years ago
Calculate the mass percent of nacl in a solution containing 3.00 g of nacl in 50.0 g of water.
vaieri [72.5K]
3.00 g + 50.0 g =53.0 g - mass of the solution

mass % = (mass solute/ mass solution)*100% = (3.00/53.0)*100% =
= 0.0566*100% =5.66%
4 0
3 years ago
How many times greater is the hydronium ion concentration in rainfall (pH = 5.0) compared to pure water (pH = 7.0)?
joja [24]
Hydronium ion is H3O(+)

pH is log 1 / [H3O(+)] = - log [H3O(+)]

Rainfall: pH = 5.0 = - log [H3O(+)] => [H3O(+)] = -antilog (- 5.0) =  10^-5

Water; pH = 7.0 = - log [H3O(+)] => [H3O(+)] = - antilog (-7.0) = 10^ -7

Divide hidronium conentration of rainfall by hidrodium concentration of water:

10^-5 / 10^-7 = 10^2 = 100.

Then, hidronium concentration in rainfall is 100 times hidronium concentration in water.

Answer: option a. 100 times.
3 0
3 years ago
Other questions:
  • A factor that changes in an experiment from manipulation of the independent variable is the what?
    10·1 answer
  • um bequer muito utilizado em laboratorio mede volumes de ate 250 ml.determine esse volume em: a)centimetros cubicos b)litros c)m
    15·1 answer
  • What should you do during a titration when you notice the indicator start to indicate the approach of the equilibrium point? Add
    12·2 answers
  • Find the atomicity of water.​
    11·1 answer
  • What do chemists think is the best measurement of concentration for describing the concentration of a solid solute dissolved in
    10·1 answer
  • How many atoms are there in 0.655 moles of C6H14?​
    7·1 answer
  • If sufficient acid is used to react completely
    13·1 answer
  • The heat of a reaction may be found with the equation q=mc triangle T. A 951 g sample of carbon steel with a specific heat capac
    6·2 answers
  • How many grams are there in 11.8 moles of sodium hydroxide
    11·2 answers
  • What is the coordination number for atoms that pack within the diamond cubic crystal structure?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!