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Lena [83]
3 years ago
5

Write the full ground-state electron configuration for each element. (a) s:

Chemistry
1 answer:
DIA [1.3K]3 years ago
7 0
[Ne] 3s² 3p⁴ is the electronic configuration of sulfur in ground state
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Ok hold on one second
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Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)
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magnesium (Mg)

Explanation:

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Why does water have a lopsided shape and act like a chemical magnet?
leva [86]

Answer:

See below  

Step-by-step explanation:

(a) Shape

The formula for water is H-O-H.

The central O atom has four electron pairs around it. They try to get as far from each other as possible, so they point toward the corners of a tetrahedron.

Only two of the pairs have a hydrogen atom attached, so water has a bent shape. The H-O-H bond angle is about 104°.

(b) Chemical magnet

The O atom has a greater attraction than H for the shared electrons in the O-H bonds, so the electrons spend more time near the O.

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The water molecule acts like a chemical magnet because its negative end attracts the positive ends of other molecules, while its positive ends attract the negative ends of other molecules.

4 0
3 years ago
A 98.0°C piece of cadmium (c=.850J/g°C) is placed in 150.0g of 37.0°C water. After sitting for a few minutes, both have a temper
Eduardwww [97]
The answer is 19.9 grams cadmium. 
Assuming there was no heat leaked from the system, the heat q lost by cadmium would be equal to the heat gained by the water:
     heat lost by cadmium = heat gained by the water
     -qcadmium = qwater
Since q is equal to mcΔT, we can now calculate for the mass m of the cadmium sample:
     -qcadmium = qwater
     -(mcadmium)(0.850J/g°C)(38.6°C-98.0°C)) = 150.0g(4.18J/g°C)(38.6°C-37.0°C)
     mcadmium = 19.9 grams
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2 years ago
Name two chemicals that can be used to prepare a standard solution in the Laboratory​
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Answer:

Two chemicals that can be used to prepare standard solutions in lab are Hydrochloric acid & Sulphuric acid.

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