3 years ago

Pls answer this question its important

Chemistry

1 answer:

Sedaia [141]3 years ago

6 0

Answer:

11) B

Explanation:

You might be interested in

What is the Anion and it’s charge.

Dafna11 [192]

Answer:

anion has a negative charge

An anion has more electrons than protons, consequently giving it a net negative charge

8 0

3 years ago

When an excited electron in a hydrogen atom falls from ????=5 to ????=2, a photon of blue light is emitted. If an excited electr

poizon [28]

Answer:

n = 3

Explanation:

Given the formula for the transition energy of an atom with 1 electron:

$E=-13.6*Z^{2}*(\frac{1}{n_{f}^{2}}-\frac{1}{n_{i}^{2}} ) eV$

For the H transition n=5 to n=2:

$E=-13.6*(\frac{1}{4}-\frac{1}{25} ) eV=-2.856 eV$

Then we solve for nf with Z=2 (Helium)

$n_{f}=\sqrt{\frac{n_{i}^{2}*Z^{2}*13.6 eV }{2.856eV*n_{i}^{2}+13.6eV*Z^{2}} }$

$n_{f}=\sqrt{\frac{4^{2}*2^{2}*13.6 eV }{2.856eV*4^{2}+13.6eV*2^{2}} }=3$

Is near 3, actually the energy of the transitions are:

H (5⇒2) = -2.85 eV = 434 nm (Dark blue)

He (4⇒3) = -2.64 eV = 469 nm (Light blue)

I thought it was cool to see the actual colors. Included them.

4 0

3 years ago

*SCIENCE*

ICE Princess25 [194]

Their radiation facilitates nuclear fusion in young stars.

7 0

3 years ago

Read 2 more answers

Scientific models can never be changed. Please select the best answer from the choices provided T F

docker41 [41]

False, because new information is being discovered all the time so they add the new information to the models to make them accurate.

7 0

3 years ago

Read 2 more answers

Which can be excluded due to the absence of fossil records

xeze [42]

Answer:

a. body of jellyfish

Explanation:

it is because they are made up of 95 percent of water and cannot be stored in rocks as fossil ...plz add my answer as brainliest

8 0

3 years ago