2 years ago

How many valence electrons does the following isotope have?

Chemistry

1 answer:

Helen [10]2 years ago

5 0

Answer:

I have solution to your question

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What is the answer for chemestry when it says 1.204 times 10^24

Sphinxa [80]

Answer: This is called moles

Explanation: This is described to be the number of molecules, atoms or ions in a substance :)

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3 years ago

One of the emission spectral lines for Be3+ has a wavelength of 253.4 nm for an electronic transition that begins in the state w

4vir4ik [10]

Answer:

Explanation:

Relationship between wavenumber and Rydberg constant (R) is as follows:

$wave\ number=R\times Z^2\frac{1}{n_1^2} -\frac{1}{n_1^2}$

Here, Z is atomic number.

R=109677 cm^-1

Wavenumber is related with wavelength as follows:

wavenumber = 1/wavelength

wavelength = 253.4 nm

$wavenumber=\frac{1}{253.4\times 10^{-9}} \\=39463.3\ cm^{-1}$

Z fro Be = 4

$39463.3=109677\times 4^2(\frac{1}{n_1^2} -\frac{1}{5^2})\\39463.3=109677\times 16(\frac{1}{n_1^2} -\frac{1}{5^2})\\n_1=4$

Therefore, the principal quantum number corresponding to the given emission is 4.

6 0

3 years ago

Help me. correct answer will be marked as brnlst

Vlada [557]

Answer:

PCI3

Explanation:

It does not obey the octet rule on the nitrogen atom.

5 0

2 years ago

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Looters break a statue into pieces. How do you expect the weathering of pieces of rock to change?

andreyandreev [35.5K]

The statue will weather faster because of more surface area.

5 0

3 years ago

Silver chloride was reacted with magnesium hydroxide, in which magnesium displaced silver

Elza [17]

Answer:

<h3>The precipitate is MgCl2</h3>

Explanation:

The reaction that is described goes as follows:

2AgCl + Mg(OH)2 ---> MgCl2 + 2AgOH

The precipitate here is the MgCl2 salt.

I hope it helped!

8 0

3 years ago