3 years ago

The sum of the numbers of protons and neutrons in a nucleus of an atom answer

1 answer:

6 0

An atom's mass number is the sum of the numbers of protons and neutrons in its nucleus. The atomic weight is the average mass of all of the isotopes of that element.

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A detail that distinguishes a solid from a liquid is-------?

svetoff [14.1K]

A solid is hard and the molecules are packed together, a liquid can move around freely because the molecules aren't as packed together :)

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An interpenetrating primitive cubic structure like that of CsCl with anions in the corners has an edge length of 664 pm. If the

san4es73 [151]

Answer:

the ionic radius of the anion $r^- = 312.52 \ pm$

Explanation:

From the diagram shown below :

The anion $Cl^-$ is located at the corners

The cation $Cs^+$ is located at the body center

The Body diagonal length = $\sqrt{3 \ a }$

∴ $2 \ r^+ \ + 2r^- \ = \sqrt{3 \ a} \\ \\ r^+ +r^- = \frac{\sqrt{3}}{2} a$

Given that :

$\frac{r^+}{r^-} =0.84$ (i.e the ratio of the ionic radius of the cation to the ionic radius of

the anion )

$0.84r^- \ + r^- \ = \frac{\sqrt{3}}{2}a \\ \\ 1.84 r^- = \frac{3}{2}a \\ \\ r^- = \frac{\sqrt{3}}{2*1.84}a$

Also ; a = 664 pm

Then :

$r^- = \frac{\sqrt{3} }{2*1.84}*664 \ pm\\ \\ r^- = 312.52 \ pm$

Therefore, the ionic radius of the anion $r^- = 312.52 \ pm$

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3 years ago

If you were given two transparent liquids how would you determine which is pure and which is salt water

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Based off the salt levels in each water.

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You have 100 milliliters of a 0.50 M MgBr2 solution and dilute it to a total volume of 200 milliliters. What is the molarity of

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The answer is 0.25 M

Use the equation C1V1=C2V2
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x=0.25

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3 years ago

At standard temperature and pressure, a 0.50 mole sample of H2 gas and a separate 1.0 mol sample of O2 gas have the same a. Aver

Harman [31]

Answer:

um i think 20

Explanation: because 20

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2 years ago