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3 years ago

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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3 years ago

classify each of the following as a pure substance or a mixture. if it is a mixture is it homogenous sea water ice cubes lemonda

KATRIN_1 [288]

Pure substance - Ice cubes

Mixture - Homogenous sea water , lemonade

Pure substance are the substance which have constant chemical composition and characteristic.

Mixture is material made up of two or more chemical substance which are not chemical bonded. These materials in mixture are not in definite proportion.

As water ice cubes has only water in it thus it is pure substance.

Homogeneous sea water contains various salts and impurities in it thus it is mixture.

Lemonade contains lemon juice and water in it . Thus, it is mixture.

To know more about pure substance and mixture

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2 years ago

How many moles of hydrochloric acid are present in 62.2 mL of 4.54 M HCl solution

stiks02 [169]

Moles of HCl = 0.282

<h3>Further explanation</h3>

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}$

Where

M = Molarity

n = number of moles of solute

V = Volume of solution

The volume of HCl=62.2 ml=0.0622 L

The molarity of HCl = 4.54 M

Then moles of HCl :

$\tt n=M\times V\\\\n=4.54\times 0.0622\\\\n=0.282~moles$

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3 years ago

Why does every plant cell have a nucleus

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