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Brilliant_brown [7]
3 years ago
5

What is the electron configuration of an isolated s atom?

Chemistry
1 answer:
Mama L [17]3 years ago
6 0
Sulfur possesses 16 electrons in its ground state. The first shell of sulfur has 2 electrons. The next shell has 8 electrons. The third and final shell of sulfur has 6 electrons. The electronic configuration is written as:

1s², 2s², 2p⁶, 3s², 3p⁴

This means that sulfur exhibits a valency of -2, which is true in many cases.
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Answer:

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2 years ago
Arrange the elements in order of increasing ionization energy: K,Br
Ilya [14]
K has the lowest and Br has the higher
7 0
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Identify the type of igneous rock that is formed when magma cools above Earth's surface?
mylen [45]

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Explanation:

5 0
3 years ago
As with other ionic compounds, potassium bromate, KBrO3, dissociates into ions when it dissolves in water. If 13.8 g of KBrO3 is
chubhunter [2.5K]

Answer:

ΔH of dissociation is 38,0 kJ/mol

Explanation:

The dissociation reaction of KBrO₃ is:

<em>KBrO₃ → K⁺ + BrO₃⁻ </em>

This dissolution consume heat that is evidenced with the decrease in water temperature.

The heat consumed is:

q = CΔTm

Where C is specific heat of water (4,186 J/mol°C)

ΔT is the temperature changing (18,0°C - 13,0°C = 5,0°C)

And m is mass of water (150,0 mL ≈ 150,0 g)

Replacing, heat consumed is:

q = 3139,5 J ≡ 3,14 kJ

13,8 g of KBrO₃ are:

13,8 g×(1mol/167g) = 0,0826 moles

Thus, ΔH of dissociation is:

3,14kJ / 0,0826mol = <em>38,0 kJ/mol</em>

<em></em>

I hope it helps!

3 0
3 years ago
What is the difference between weight and mass?
Marina86 [1]

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The weight may vary, but the mass is constant.

The mass is measured in kilograms (kg), while the weight is measured in newtons (N).

Mass refers to the amount of matter an object has, but the weight refers to the force of gravity acting on an object.

4 0
3 years ago
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