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3 years ago

When an atom is neutral the...?

Physics

2 answers:

KATRIN_1 [288]3 years ago

5 0

Answer:

Explanation:

if numbers of protons and electrons are equal, the atom is neutral

marin [14]3 years ago

4 0

Answer:

C.the number of protons and electrons are the same.

Explanation:

Protons have a positive charge, while electrons have a negative charge.

So, if there are more electrons (-) than protons (+), the atom will have a negative charge.

If the atom has more protons (+) than electrons (-), it will have a positive charge.

If they have the same number of negative and positive, they "cancel" out, making it neutral.

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2 years ago

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What is the main idea of this text of "Phillis Wheatley"

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3 years ago

Calculate the wavelength of the electromagnetic radiation required to excite an electron from the ground state to the level with

anastassius [24]

Answer:

2.11 m

Explanation:

Given data

h=6.626× $10^{-34\\}$ (plank constant)

L=45.7 pm

n=n2-n1

n=5-1

n=4

where,

n2=5

n1=1

To find:

E=?

λ=? (Wavelength)

solution

The energy stored in an electron at a specified level is given by;

E= $h^{2}$ × $n^{2}$ ÷8m $l^{2}$ ..........(1)

m=mass of electron(9.1× $10^{-31}$ )

l=length of box

To find E

putting the value of given data in eq(1)

E=9.41× $10^{-16}$

To find λ

λ=hc/E............................(2)

c=3× $10^{8}$ (speed of light)

putting the value in eq 2 to find wavelength

λ=2.11 m

Note:

There is a chance in calculation error. but the method is correct to solve the problem.

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3 years ago

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If the magnetic field in a traveling EM wave has a peak value of 17.9nT, what is the peak value of the electric field strength?

Doss [256]

Answer:

5.37 N/C

Explanation:

Peak value of magnetic field, Bo = 17.9 nT = 17.9 x 10^-9 T

The electromagnetic wave is produced when an oscillating electric and magnetic field interacts each other perpendicularly.

The direction of propagation of electromagnetic wave is perpendicular to both electric and magnetic field.

the relation between the electric field and magnetic field amplitudes is given by

$c = \frac{E_{0}}{B_{0}}$

where, c be the velocity of light, Eo be the peak value of electric field strength, Bo is the peak value of magnetic field strength.

$3\times 10^{8} = \frac{E_{0}}{17.9\times 10^{-9}}}$

Eo = 5.37 N/C

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3 years ago

What is the difference between the two electrons of a combined hydrogen atom that has formed H2.

lisov135 [29]

For both of the reactions shown, the hydrogen molecules are oxidized and the oxygen atoms are reduced.
I hope I helped! =D

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4 years ago