All categories

3 years ago

If you had 4 protons and 5 neutrons you created which element *

Chemistry

1 answer:

ivanzaharov [21]3 years ago

8 0

Answer:

Beryllium

Explanation:

No. of protons = 4

<em>No. of electrons = 4 (number of protons and neutrons are the same)</em>

No. of neutrons = 5

You need to look at the number of electrons of the outer shell (group no.) there are and how many shells there are (period no.)

Then look at the period table of elements to find the element

You might be interested in

When organizing your narrative, what are the 3 sections that make up a story (planning the specific order)

Sveta_85 [38]

Answer:

#1 Exposition

#2 Background information

#3 Complication

this is right unless you're speaking of theme plot conflict climax falling action or conclusion

3 0

3 years ago

For an endothermic reaction at equilibrium, the addition of a catalyst

Tatiana [17]

Answer:

causes no shift

Explanation:

6 0

3 years ago

Does carpet have molecules

andreev551 [17]

Answer:

Yes

The simple answer is yes. Almost everything has atoms and molecules consisting in it. The answer is yes. Hope it helps!

7 0

3 years ago

Read 2 more answers

How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+Cr3+ using a current of 55.2 amps in

Kamila [148]

Answer : The time it take to plate out will be, 3.69 minutes.

Explanation :

First we have to calculate the moles of Cr.

$\text{Moles of }Cr}=\frac{\text{Mass of Cr}}{\text{Molar mass of Cr}}$

Molar mass of Cr = 51.9 g/mol

$\text{Moles of }Cr}=\frac{2.19g}{51.9g/mol}=0.0423mol$

The cathode half-reaction is,

$Cr^{3+}+3e^-\rightarrow Cr$

From this we conclude that,

The number of electrons (n) in the reaction are 3.

The quantity of charge required for the reduction of 1 mole of $Cr^{3+}$ = $3\times F$

The quantity of charge required for the reduction of 0.0423 mole of $Cr^{3+}$ = $0.0423\times 3\times F=0.1269F=0.1269\times 96500C=12245.85C$

Now we have to calculate the time taken.

We know that,

$q=I\times t$

$t=\frac{q}{I}=\frac{12245.85C}{55.2A}=221.845s=3.69min$

Thus, the time it take to plate out will be, 3.69 minutes.

7 0

3 years ago

In a combustion reaction, pentane (molar mass (MM) = 72.17 g/mol) burns, in the presence of oxygen (MM = 32.00 g/mol), to produc

ladessa [460]

It is C bc I’m right anyits a free country

3 0

3 years ago