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3 years ago

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What is the name given to the electrons in the highest occupied energy level of an atom? -anions -cations -valence electrons -or

bital electrons

1 answer:

Serhud [2]3 years ago

5 0

Answer:

i know the answer the answer is valence electrons.

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A balloon at 32 °C is filled with 21 L of air. What would its volume be at a temperature of 52 °C, assuming pressure remains con

I am Lyosha [343]

Answer:C). 24L

Explanation: it works

4 0

4 years ago

I don’t understand how to find these please help

ddd [48]

Answer:

8 shared electrons

Explanation:

When you are looking for the number of shared electrons via the equation:

S = N-A

Where:

S = means the shared electrons

N = Needed electrons

A = available electrons

"Needed electrons" means how many electrons does it need to have a noble gas configuration, in this case, to complete the octet rule.

"Available electrons" means how many valence electrons is actually available considering the compound or the elements involved in the compound.

To get the needed electrons, treat the elements involved separately. We have a silicon (Si) atom and 4 chlorine (chlorine) atoms in this compound. Let's list it down first:

Number of atoms

Si 1

Cl 4

Next step is to determine how many electrons should it have in its outer shell to achieve the octet rule. Both of them in this case would be 8. Multiply that by the number of atoms and add up the needed electrons to determine how many you will need for this particular compound.

<u> Number of atoms Electrons to achieve Octet Needed</u>

Si 1 x 8 = 8

Cl 4 x 8 = <u> 32</u>

TOTAL: 40

This is now our N. N = 40 electrons

Next step is to determine how many we actually have. Your clue in determining how many valence electrons the atom has is the group. Silicon is in Group 4A, this means it has 4 valence electrons. Chlorine is in Group7A, so ths means it has 7 valence electrons.

So first we write the number of atoms again, then in the next column, you write down the actual number of valence electrons and multiply them. Sum it up to see how many electrons available in this particular compound.

<u> Number of atoms Valence electrons Available</u>

Si 1 x 4 = 4

Cl 4 x 7 = <u> 28</u>

TOTAL: 32

This is now our A. A = 32 electrons

Now we apply this:

S = N - A

N = 40 electrons

A = 32 electrons

S = 40 - 32 = 8

Number of shared electrons is 8

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3 years ago

Luke and Sian want to plant a vegetable garden in their yard. A soil testing kit measures the soil pH at 5.0, but the lettuce th

dexar [7]

Answer:

So, Luke and Sian has to increase the pH of the soil by adding base to it.

Explanation:

The pH is defined as the negative logarithm of the hydrogen ion concentration in their aqueous solution.

$pH=-\log[H^+]$

With increase in hydrogen ion concentration the pH value decreases.
With decrease in hydrogen ion concentration the pH value increases.

The pH of the soil after testing it on a kit comes out be 5.0, but they both need pH of the soil to 6.5.

Comparison of pH of soil:

= 5.0 < 6.5

= High hydrogen ion concentration > High hydrogen ion concentration

So, Luke and Sian has to increase the pH of the soil by adding base .Doing so will decrease the hydrogen ion concentration in the soil (where as addition of acid lower the pH of soil).

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3 years ago

How many Dalmatian puppies are in Pongo and Perdita’s litter?

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3 years ago

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lana [24]

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$\mu=\frac{kg}{m*s}$

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3 years ago