All categories

4 years ago

The electron configuration of an element is [Ar] 4s23d104p2. Identify this element.

Chemistry

1 answer:

algol134 years ago

4 0

Answer:

The element is germanium (Ge)

Explanation:

First of all we are considerating a neutral state element, meaning that it has the same amount of electrons and protons.

Also, [Ar] 4s2 3d10 4p2. means that the unknown element has the same electronic configuration as Argon, plus the electrons in the 4s, 3d and 4p.

So:

Argon has 18 electrons and protons (atomic number Z=18)

The element has 2 electrons in 4s, 10 in 3d and 2 in 4p: 2+10+2=14

The total electrons it has is: 14+18=32 electrons, and as we said before it also has 32 protons.

Once calculated the protons, we know the atomic number (Z=32) and we can look in the periodic table the element with Z=32.

That element is germanium (Ge)

You might be interested in

Which of the following best defines weather?

brilliants [131]

C

Everyday, ever hour and so on the weather changes, when looking at the weather on an app or website, the weather is defined by the conditions at a certain time. Hope this helps!

6 0

3 years ago

Phosphorus pentachloride reacts with water to give phosphoric acid and hydrogen chloride according to the following equation:

Anarel [89]

Answer: 52.4 grams

Explanation:

The two reactants PCl5 and H2O, must occur in a 1:4 ratio, so that tells us, that we need 4 times more H₂O than phosphorus pentachloride.

0.287 moles PCl5 multiplied by 4 equal 1.15 moles H2O. That tell sus that 1.15 moles H2O is needed.

Because we have 3.84 moles H2O, the PCL5 is the limiting reactant.

0.287 mol PCl₅ x (5 mol HCl divided by 1 mol of PCl₅) x ( 36.5g HCl divided by moles of HCl) = 52.4 g of HCl is formed

(Hopefully this helps!)

5 0

3 years ago

Read 2 more answers

An Isolated system could be best described as a _______________.

grandymaker [24]

Hello Mate!

Well, there are many definitions and descriptions of isolated systems, and here are some of them:

1. It can be a physical system which is located very very far from all other systems, so there is absolutely no interaction between them, thus making it isolated.

2. It can be a thermodynamic system with rigid walls, which prevents mass and energy to pass through.

I Hope my answer has come to your Help. Thank you for posting your question here in $Brainly.$ We hope to answer more of your questions and inquiries soon. Have a nice day ahead! :)

$(Ps. Mark As Brainliest IF Helped!)$

$-TheOneAboveAll :D$

5 0

4 years ago

What is the balanced form of the chemical equation shown below?

Tanzania [10]

B. 1, 1, 1, 2
Explanation:
You only need to balance the NaNO3 on the right. Since there is 2 NO3 on the left, you need to put a 2 in front of the NaNO3 on the right. Everything else is already balanced so the only coefficient needed is 2 in front of the NaNO3.

7 0

3 years ago

If an element has more than one ionic charge, how is that piece of information represented in a chemical name?

solmaris [256]

Usually with roman numerals, like iron (II) chromate
iron has a charge of 2
or manganese (IV) oxide, manganese has a charge of 4
(these are ionic compounds just to let you know)

4 0

3 years ago