What's the difference between atomic orbit and electron cloud?

What's the difference between atomic orbit and electron cloud?

The electron cloud is an image of the orbital shape of an atom

What is the difference between the concepts of electron cloud and atomic orbit?

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Atomic orbit is the movement mode of electron in atom, also known as wave function. It describes the behavior of electron in the form of wave. Atomic orbit is not a clear orbit in classical mechanics (in fact, it does not contain the meaning of orbit)
The square of the absolute value of the wave function (which is a function of the spatial position) represents the probability density of the occurrence of electrons somewhere in the space. The graph of the square of the absolute value of the wave function drawn by using the density of black spots to represent the probability density is the electron cloud
In short, the electron cloud represents the absolute square of the wave function (atomic orbit)

Are atomic orbits different from electron clouds

There are several chickens and rabbits. The ratio of total head to total feet is 2:5. The ratio of chickens to rabbits is ()
How much is it?

The ratio of head to foot is 1:2 for a chicken and 1:4 for a rabbit
It can be seen that the head to foot ratio of chickens and rabbits is 1 more than the head, and the head to foot ratio of chickens and rabbits is 2 more than the head
…… and so on
5-2 = 3
Then 3:1
Do you understand?
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Given x + y = 7, xy = 2, find the value of ① 2x ^ 2 + 2Y ^ 2
Such as the title

x^2+y^2=(x+y)^-2xy=49-4=45
2x^2+2y^2=45*2=90

Three times of a number minus 40% of 20, the difference is 7, what is the number? 20% of a number is 21 less than 2 / 3, what is the number ten

Three times of a number minus 40% of 20, the difference is 7, the number is (20 × 40% + 7) △ 3 = 5
20% of a number is 21 less than 2 / 3 of it. This number is 21 (2 / 3-20%) = 45

X ^ 2 + XY + y ^ 2 = 100, find the positive integer solution of X, y

1. Number of sets
2. It may be better to draw with geometry
3. Acting for sin a and COS a in X, y
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It is known that it takes 80 hours for one person to plant trees in a certain unit. Now some people plant trees for 5 hours first, because the unit has an emergency
If the efficiency of these people is the same, how many people should be arranged to plant trees first?

Because one person needs 80 hours to complete, the amount of one person's 1 hour is 1 / 80
Suppose the number of people arranged first is x, then
5X(1/80)+4(X+2)(1/80)=1
5X+4X+8=80
9X=72
X=8
A: the number of people arranged first is 8

Find the roots of the equation (x-a) 2 = 4B (B ≥ 0) about X

The solution of (x-a) 2 = 4B (B ≥ 0) x-a = ± 2b is: X1 = a + 2B, X2 = a-2b

If there are 40 students participating in the party, which store should I go to
In order to promote the sale of a new brand of beverage, the big bottle (1200 ml) costs 10 yuan, and the small bottle (200 ml) costs 2 yuan. In order to promote the sale of this kind of beverage, three stores have introduced preferential measures: one big bottle for free in store a, 10% off in store B, and 30% off in store C
If there are 40 students participating in the party, which store is more suitable to buy?

Is this a real life problem or a book title? Please be complete