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malfutka [58]
3 years ago
14

HELP PLEASE 10 points!!! + brain 6-9Q

Chemistry
1 answer:
nadya68 [22]3 years ago
8 0
6. The answer is B, periods.
They represent the number of occupied electron shells of an element. For example, potassium (19 electrons) and calcium (20 electrons) are both on the same period, as they both have 3 occupied electron shells. 

7. In his table, he arranged some known elements (which are a lot less comparing to nowadays), into columns and rows. He put the elements with the similar chemical properties into the same column.

8. 
A: Atomic number. (the number of protons of that element)
B: The chemical symbol of the element. 
C: The name of the element 
D: The relative atomic mass of the element

9. Relative atomic mass is the average mass of the isotopes of an element. Each isotope has a different mass as the number of neutrons is different. Since each isotope of an element has a different abundance in nature, it's nearly impossible to have a whole number of relative atomic mass. 

For example, Cl-35 has an abundance of around 75.4%, and Cl-37 has an abundance of 24.6%.
So the relative atomic mass of chlorine is 75.4% x 35 + 24.6% x 37 = <span>35.492. which is not a whole number.</span>
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sertanlavr [38]

Answer is: Check for the presence of alpha, beta, and gamma particles.

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If you had 1.00 kg of each kind of hardware, how many boxes of each would you<br> have?
dusya [7]

The number of boxes is calculated by dividing the

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<h3>What is a hardware?</h3>

A hardware is a physical component of a system that can be touched and felt.

Because hardware are physical components, they always have a given mass.

Assuming, several hardware each of mass 1.00 kg is available to be chosen from.

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The number of boxes can be calculated as follows:

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Therefore, the number of boxes is obtained by dividing the sum of the mass of the boxes by 1.00 kg.

Learn more about hardware and mass at: brainly.com/question/25698914

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Is damp wood and ignition source?
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Also can I plz get brainiest?

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antoniya [11.8K]

Answer:

D

Explanation:

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What is the volume of 2.10 moles of chlorine gas (Cl2) at 273 K and 1.00 atm?
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I think the answer is 47.1 . I'm not sure. Iv'e done it before but I haven't got my grade for the answer yet. Hope this right and hope it helps!
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