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Stella [2.4K]
3 years ago
15

On the basis of electronegativity, which of these pairs of elements is most likely to form monatomic ions?

Chemistry
2 answers:
mixer [17]3 years ago
8 0

Answer is: Cl and Na.

sodium and chlorine are in third period and they have very different properties. Sodium is solid metal and chlorine is gaseous nonmetal.

They form compound NaCl (Sodium chloride), because sodium lost one valence electron and form cation Na⁺, chlorine gain one electron and form anion Cl⁻.

Electron configuration of sodium atom: ₁₁Na 1s² 2s² 2p⁶ 3s¹.

Electron configuration of chlorine atom: ₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵.

Other examples are metal-metal pairs and they do not form cation and anion.

tigry1 [53]3 years ago
3 0
"Cl and Na" is the one pair among the following choices given in the question that is most likely to form monatomic ions on the <span>basis of electronegativity. The correct option among all the options that are given in the question is the first option. I hope the answer has come to your great help.</span>
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Given the following UNBALANCED reaction: NH3 (g) &lt;--&gt; N2 (g) + H2 (g) If 1
Yakvenalex [24]

Answer:

C. 1.35

Explanation:

                                                     2NH3 (g) <-->          N2 (g) +             3H2 (g)

Initial concentration                2.2 mol/0.95L       1.1 mol/0.95L           0

change in concentration        2x                             x                           3x

                                                 -0.84 M                  +0.42M                +1.26M

Equilibrium                       1.4 mol/0.95L=1.47M        1.58 M                   1.26 M

concentration

Change in concentration(NH3) = (2.2-1.4)mol/0.95 L = 0.84M

Equilibrium concentration (N2) = 1.1/0.95 +0.42=1.58 M

Equilibrium concentration(NH3) = 1.4/0.95 = 1.47M

K = [N2]*{H2]/[NH3] = 1.58M*1.26M/1.47M = 1.35 M

8 0
3 years ago
Which of the listed properties is the same for the elements beryllium (Be), magnesium (Mg), and calcium (Ca)?
Setler79 [48]
Answer is valence electron, they all have total of 2 valence electron.
remember group number = valence electron
7 0
3 years ago
Read 2 more answers
You drop a rock weighing 23.2 g into a graduated cylinder that contains 55 mL. The level
snow_lady [41]

Answer:

<h2>3.31 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 23.2 g

volume = final volume of water - initial volume of water

volume = 62 - 55 = 7 mL

We have

density =  \frac{23.2}{7}  \\  = 3.314285

We have the final answer as

<h3>3.31 g/mL</h3>

Hope this helps you

8 0
3 years ago
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Amanda [17]
Many food chains together create a food web.


hope this helps,, have a nice day :))
3 0
3 years ago
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Answer:

Explanation:

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