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elena-s [515]
3 years ago
12

The electron configuration of Ca+2 is most similar to that of?

Chemistry
1 answer:
Airida [17]3 years ago
8 0

The electron configuration of Ca⁺² is most similar to that of Ar(Argon)

<h3>Further explanation  </h3>

In an atom, there are levels of energy in the shell and sub-shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d, and f. The maximum number of electrons for each sub-shell is  

  • s: 2 electrons  
  • p: 6 electrons  
  • d: 10 electrons and  
  • f: 14 electrons  

Charging electrons in the sub-shell uses the following sequence:  

<em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc</em>.  

Calcium (symbol Ca) is an alkaline earth metal element with an atomic number of 20, so the number of electrons is 20 (for neutral atoms)

The electron configuration of Ca :  [Ar] 4s² ⇒ 1s² 2s² 2p⁶ 3s²3p⁶4s²

For the Ca²⁺ cation, which has a +2 charge, it is obtained by removing 2 electrons, so that the electron configuration is the same as for the element Ar (argon): 1s² 2s² 2p⁶ 3s²3p⁶

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a solution of iron 3 sulfate and a solution of lead 2 perchlorate react to produce lead 2 sulfate precipitate
777dan777 [17]

Balanced equation :

Fe2(SO4)3 + 3Pb(ClO4)2 → 2Fe(ClO4)3 + 3PbSO4

<h3>Further explanation</h3>

Given

Word equation

Required

Balanced equation

Solution

Chemical equations can be expressed in terms of:

  • word equation
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Word equation :

a solution of iron 3 sulfate and a solution of lead 2 perchlorate react to produce lead 2 sulfate precipitate

Skeleton equation :

Fe2(SO4)3 + Pb(ClO4)2  → Fe(ClO4)3 + PbSO4

Balanced equation :

Fe2(SO4)3 + 3Pb(ClO4)2 → 2Fe(ClO4)3 + 3PbSO4

7 0
3 years ago
According to the information above what is the standard enthalpy of formation for nh3
olga2289 [7]
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4 0
3 years ago
How many grams of ammonium chloride (NH4Cl) would be required to make a saturated solution in 1000 grams of water at 50 degrees
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<span>Since,
1000 grams of water = 1000 mL of water</span><span>
So, 
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</span>1000 mL = 10 x 100 mL
<span>
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6 0
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