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Marianna [84]
3 years ago
7

The element with 8 electrons in its 3d sublevel is a. O. b. Ne. c. Ar. d. Ni.

Chemistry
2 answers:
Lana71 [14]3 years ago
7 0

NI nickel atomic number 28 i took the test

Evgesh-ka [11]3 years ago
5 0

The element with 8 electrons in its 3d sublevel is Ni, Nickel. The answer is letter D. The rest of the choices do not answer the question above. 

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How do the melting and boiling points of pure water differ from those of a sugar-water solution?
Vesnalui [34]

When a solute, sugar in this case, is added, the boiling point of the solution increases. Additionally, the melting point decreases.

To answer your question,

The boiling point of pure water is lower than sugar-water solution.

The melting point is higher for pure water than for sugar-water solution.


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6 0
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For which of the following processes would there be a decrease in entropy?
Anni [7]

d. Freezing water!

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Lead has an atomic number of 82. Which statement describes all neutral atoms and ions of lead?
IRINA_888 [86]

The neutral atom of lead must have 82 protons while ions can have b or less than 82.

The atomic number of an element is the number of protons in the nucleus of the element.

Also, for neutral atoms, the number of protons equals the number of electrons.

In ionic form, the number of protons/electrons of an atom may vary and be different from that of the neutral form.

Positive charges mean that the ion has less proton than its neutral version while negative charges mean that it has more electrons than its neutral version.

Thus, the neutral atom of lead will contain an equal number of protons as the electrons while its ionic form can have more or less than 82 protons.

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6 0
2 years ago
12. Chubchub runs a 440m lap in 1.2 minutes. How many laps will Chubchub
Svet_ta [14]

Answer:

the  number of laps in the case when he run for 50 minutes is 18,333.33

Explanation:

The computation of the number of laps in the case when he run for 50 minutes is shown below:

Given that

He runs 440m lap in 1.2 minutes

So in 50 minutes he can have laps of

= 440 × 50 ÷ 1.2

= 18,333.33 laps

hence, the  number of laps in the case when he run for 50 minutes is 18,333.33

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There are four laws of thermodynamics that define fundamental physical quantities (temperature, energy, and entropy) and that characterize thermodynamic systems at thermal equilibrium.

Explanation:

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