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Vikki [24]
3 years ago
8

What is the electronic configuration of the following atoms?

Chemistry
1 answer:
Nastasia [14]3 years ago
7 0

Answer:The electron configuration of an atom shows the number of electrons in each sublevel in each energy level of the ground-state atom. To determine the electron configuration of a particular atom, start at the nucleus and add electrons one by one until the number of electrons equals the number of protons in the nucleus. Each added electron is assigned to the lowest-energy sublevel available. The first sublevel filled will be the 1s sublevel, then the 2s sublevel, the 2p sublevel, the 3s, 3p, 4s, 3d, and so on. This order is difficult to remember and often hard to determine from energy-level diagrams such as Figure 5.8

A more convenient way to remember the order is to use Figure 5.9. The principal energy levels are listed in columns, starting at the left with the 1s level. To use this figure, read along the diagonal lines in the direction of the arrow. The order is summarized under the diagram

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Who was the inventor of the lightbulb?
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Find the energy required to melt the copper once it's reached the melting point.
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The answer has to depend on the mass of the copper that you're trying to melt. 

But there is a formula which you can calculate the energy required if you have the information of the mass. This formula requires the value called specific latent heat of fusion, which is the energy required to melt or freeze a specific mass of copper without changing its temperature but change its state. 
E = m l_{f}
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8 0
3 years ago
In the reaction MgCl2 + 2KOH Mg(OH)2+ 2KCI, if 3 moles MgCh are added to 4 moles KOH, what determines how much Mg(OH)2 is made?
gulaghasi [49]

Answer:-

KOH determines how much Mg(OH)2 is made.

2 mol of Mg(OH)2 formed

Explanation:-

The balanced equation is

MgCl2 + 2KOH --> Mg(OH)2+ 2KCI,

From seeing the coefficients we notice

2 mol of KOH reacts with 1 mol of MgCl2

4 mol of KOH reacts with 1 x 4 / 2 = 2 mol of MgCl2

3 moles of MgCl2 was added but only 2 mol react.

So we see there is excess MgCl2 .

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So KOH determines how much Mg(OH)2 is made.

We see from the balanced chemical equation,

2 mol of KOH gives 1 mol of Mg(OH)2.

4 mol of KOH will give 1 x 4 /2 = 2 mol of Mg(OH)2.

7 0
4 years ago
why are gases like nitrogen and oxygen not greenhouse gases despite being gases that exist in the atmosphere?
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<h3>What are Greenhouse gases?</h3>

Greenhouse gas is a gas that has the property of absorb infrared radiation from the Earth’s surface and reradiate back to the Earth’s surface, thus contributing to the greenhouse effect.

<h3>What is infrared radiation?</h3>

Infrared radiation is an electromagnetic radiation with wavelengths longer than those of visible light.

Carbon dioxide, nitrous oxide, methane, and water vapour are the most important greenhouse gases.

Hence, nitrogen and oxygen are not greenhouse gases despite being in the atmosphere.

To learn more about greenhouse gas here

brainly.com/question/27590185

#SPJ2

7 0
3 years ago
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