No two electrons can have the same four quantum numbers is known as the
Answers
Answer:
- Pauli's exclusion principle
Explanation:
You can read this principle in any chemistry or physics textbook that deals with quantum numbers. It states that two electrons of an atom cannot have the same set of four quantum numbers.
As result:
- Any orbital can have a maximum of two electrons, and
- Two electrons in a same orbital have opposite spins: one will have +1/2 and the other will have -1/2.
Remember, that the quantum numbers are the numbers that identify the electrons in an atom.
- n is the principal quantum number, and can have positive integer vaules: 1, 2, 3, 4, 5, 6, 7, ...
- ℓ is the Azimuthal or angular momentum quantum number. It can have integer values from 0 to n -1: 0, 1, 2, 3, 4, ...
- mℓ is the magnetic quantum number, which can have values from -ℓ to + ℓ
- ms is the spin quantum number. which can have values +1/2 and -1/2.
In this way, Pauli's exclusion principle implies that two electrons occupying the same orbital will have equal n, ℓ, and mℓ values, meaning that their ms will be opposite: + 1/2 and −1/2.
Final answer:
The rule that no two electrons can possess the same four quantum numbers is known as the Pauli Exclusion Principle. Proposed by Wolfgang Pauli, this rule dictates that no two electrons can be in the same state within an atom. It limits the number of electrons in atomic shells and subshells, influencing the structure of atoms.
Explanation:
The rule that no two electrons can have the same four quantum numbers is known as the Pauli Exclusion Principle. These quantum numbers include: principal quantum number (n), orbital angular quantum number (l), magnetic quantum number (m), and spin quantum number (ms).
An Austrian physicist, Wolfgang Pauli, proposed this rule in 1925. This principle means that two electrons can share the same orbital if only their spin quantum numbers have different values. Since the spin quantum number can only take two values: +½ or -½, a maximum of only two electrons can occupy the same orbital. As a result, any atomic orbital can be populated by zero, one, or two electrons only.
This principle is important because it limits the number of electrons in atomic shells and subshells, and thus plays a crucial role in determining the structure of atoms and the characteristics of the elements on the periodic table.
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Answers
D = (1/2) (gravity) (time)² .
If the ball falls 0.9 meter, then
0.9 m = (1/2) (9.8 m/s²) (time)²
Divide each side
by 4.9 m/s² : 0.9 m / 4.9 m/s² = time²
Take the square root
of each side: time = √(0.9/4.9) sec²
= 0.43 second .
The horizontal motion of the ball makes no difference.
It doesn't matter whether the ball rolls off of a table,
gets dropped from a hand, or shot horizontally from
a gun. It still hits the floor or the ground 0.43 sec later.
Answer:
.35 s
Explanation:
x = v(i)t + 1/2at^2
gravity = 9.81 m/s^2 = a
.6 m = 1/2at^2
(.6 m) * 2 = (1/2at^2)*2
1.2 m = at^2
(1.2 m)/a = (at^2)/a
0.12 s^2 = t^2
sqrt(.12 s^2) = sqrt(t^2)
.35 s = t
Answers
Answer:
By the information given, I am not sure how the event has played out. However, using common knowledge, I can give a scenario of how it may play out.
When removing the first block (the foundation), gravity will pull the other blocks down, as the strength of gravity exceeds that of the strength of air holding it up. This means that all the blocks on top would fall.
By definition of Newton's 1st - 3rd laws, the blocks would not move unless a force is given to it (i.e., removing the bottom block, which causes gravity). Gravity would pull the other blocks downwards. This would lead to the falling of the stack of blocks.
~
Answer:
Explanation:
A stack of blocks sits in equilibrium. That means, by Newton's 1st law, all blocks will remain stationary. The weight of each block is balanced by the reaction force from the block underneath it. The bottom block experiences a reaction force equals to the total weight of all blocks from the ground.
When the bottom block is removed, there will not be any reaction force from the ground. That causes a disturbance in the equilibrium. Without the balancing reaction, the blocks will have the gravity force from their weights pulling them down. By Newton 2nd law, the unbalance force will cause the blocks to accelerate towards the ground until they all crash-land.
Answers
Acceleration =
(change in speed) / (time for the change)
and
direction of the change.
Change in speed = (end speed)-(start speed) = (60 - 25) = 35 f/s
Time for the change = 5 sec
Direction of the change = west
Acceleration = 7 ft/sec² west .
Answers
Light travels at speed of
The distance covered by the light during this time can be found with the formula
where S is the distance covered and t the time. By re-arranging this formula and by plugging the numbers into it, we find how far the light went in 1 millisecond:
Final answer:
The speed of light is approximately 299,792 kilometers (186,282 miles) per second. Given a millisecond is a thousandth of a second, light will travel approximately 299.792 kilometers in one millisecond.
Explanation:
The speed of light in a vacuum, such as outer space, is a set constant in physics, approximately 299,792 kilometers per second, or about 186,282 miles per second. Thus, if we want to know how far light travels in 1 millisecond, that is, one hundredth of a scecond, we need to convert seconds into milliseconds.
There are 1,000 milliseconds in one second. Hence, in 1 millisecond, light will travel about 299.792 kilometers (or about 186.282 miles).
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Answers
B. Electrolytes
C. Nonelectrolytes
D. Ions
Answers
Answer:
Ions are atoms that carry an electric charge.
Explanation:
An ion is an atom or molecule that does not have a neutral electric charge. In other words, ions are atoms or groups of atoms that have an electric charge. Ions with a positive charge are called cations. Those with a negative charge are called anions.
Ionization is the formation of electrically charged molecules or atoms. Atoms are electrically neutral. The loss of one or more electrons from a neutral atom forms a cation. Conversely, an anion is an ion whose net charge is negative due to an increase in the number of electrons.
Cations and anions are usually represented with the symbol of the corresponding atom or group of atoms and the symbol "+" or "-", respectively. If the number of electrons gained or lost is greater than one, this is indicated by the corresponding number.