The transition between n=1 and n=2 corresponds to the longest wavelength with the lowest frequency.
An electron is said to be "excited" when it is promoted to a higher energy level inside its bound state.
Either the electron absorbs a photon and obtains all of its energy, or it receives energy via a collision with another, energetic electron.
Understanding energy levels :
Therefore the transition between n=1 and n=2 corresponds to the longest wavelength at the lowest frequency.
The higher the frequency of a photon, the higher its energy.
The longer the wavelength of a photon, the lower its energy.
E ∝ 1/λ [ FOR PHOTON ]
The lowest energy is 1 eV, which corresponds to the transition between the n=1 and n=2 levels.
The longest wavelengths are associated with the lowest energies, so transitions between n=1 correspond to the longest wavelengths.
The term "thermal excitation" refers to the process by which electrons within a semiconductor crystal lattice are elevated to a higher energy band via lattice vibrations. This process, known as electron relaxation, occurs when an excited electron returns to a less energetic state.
As a result, a photon is released into the environment, or energy is transferred to another particle. The amount of energy released is proportional to the gap in potential energy between the electron's lowest and highest states.
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what is the total number of valence electrons un xenon(xe)
Answer:
8
Explanation:
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what is the frequency of a 2,600 cm wave
Answer: 1.15 × 10⁷ Hz
Explanation:
Frequency = Speed of Light ÷ Wavelength
= (2.99 × 10⁸ m/s) ÷ (2.6 × 10 m)
= 1.15 × 10⁷ Hz
The frequency of a wave of wavelength 2600 cm is 1.15 × 10⁷ Hz
Notes:
Hz ≡ /s
1 m = 100 cm
The frequency of a 2,600 cm wave is 1.15 × 10⁷ s⁻¹
From the question,
We are to determine the frequency of a wave with wavelength 2600 cm.
Using the formula
[tex]c = \nu \lambda[/tex]
Where c is the speed of light (c = 3.0 × 10⁸ m/s)
[tex]\nu[/tex] is the frequency
[tex]\lambda[/tex] is the wavelength
Then, we can write that
[tex]\nu = \frac{c}{\lambda}[/tex]
From the question
λ = 2600 cm = 26 m
Putting the parameters into the formula, we get
[tex]\nu = \frac{3.0 \times 10^{8} }{26}[/tex]
[tex]\nu = 0.11538 \times 10^{8}[/tex]
[tex]\nu \approx 1.15 \times 10^{7} \ s^{-1}[/tex]
Hence, the frequency of a 2,600 cm wave is 1.15 × 10⁷ s⁻¹
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Which of these element is NOT an alkali metal? Na Rb H cs
Answer: Hydrogen-H
Explanation: Hydrogen is a gas, the most abundant element in the universe and the simplest of them all
Is this equation balanced? Explain why the equation S+3O2 → SO3 is balanced or is not balanced. Use four different words from the word bank to earn (4 points).
We can check if the equation is balanced by comparing the number of atoms of each element on the reactant and product sides. The reaction is only balanced if the number of atoms of each element is equal.
S + 3O₂ → SO₃
Reactant Product
S 1 1
O 6 3
∴ the equation is UNBALANCED since the number of atoms of oxygen on the reactant side is greater than that of the product.The balanced equation would be 2 S + 3O₂ → 2SO₃
Reactant Product
S 2 2
O 6 6
The atomic number tells you the number of_______ in one atom of an element. It also tells you the number of_________ in a neutral atom of that element. The atomic number gives the indentity of an element as well as its location on the Periodic Table. No two different element will havr the________ atomic number
Explanation:
script ok script ok ok ok
coal mining environmental impact
Explain what impact coal mining has and what it affects
CAN SOMEONE PLS HELP THANK U
Answer:
There are significant environmental impacts associated with coal mining and use. It could require the removal of massive amounts of top soil, leading to erosion, loss of habitat and pollution. Coal mining causes acid mine drainage, which causes heavy metals to dissolve and seep into ground and surface water.
Explanation:
if one mole of na3po4·3h2o is heated extensively, how many moles of water are released?
When one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.
The water molecules in Na3PO4.3H2O are called molecules of water of crystallization. These molecules are not covalently bonded to the Na3PO4 molecule. They are only loosely attached to the substance.
Strong heating will drive away these molecules of water of crystallization to give three moles of water in the product.
Hence, when one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.
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what is the acceleration due to gravity of the moon
in the reaction of aluminum metal and oxygen gas to make aluminum oxide, how many moles of aluminum will react with 0.80 grams o2?
Explanation:
When 6.38 moles of O2 and 9.15 moles of Al react, the ratio of aluminum to oxygen is 9.15/6.38 = 1.434. This shows that all of the oxygen is consumed before the aluminum and when the reaction ends the reactant aluminum is left. The number of moles of Al2O3 formed is approximately 4.25 moles.
why does iodine have a lower atomic mass than tellurium
Can someone please tell me the answer on this. First person to answer will most definitely be marked brainliest so please just tell me the answer. The deadline is in 5 MINUTES!!
particles, high, low, oxygen, waste, carbondioxide, fast.
9 ml of a sugar solution was mixed with 3 ml of a 76% sugar solution to make a 73% sugar solution. Find the percent concentration of the first solution.
Who was the first to recognize that the observations and experimental results
regarding matter could be explained by the existence of atoms?
a. Grookes
b. Rutherford
c. Ballen
d. Chadwick
Someone pls help me I will make you brain
Answer:3
Explanation:
PLS HELP Make this a brief short summary.....
Answer:
Democritus was the first person to hypothesize the existence of atoms (the idea that you can't keep dividing matter forever). Scientists did eventually prove the existence of atoms. however, they aren't completley how he imagined them.
15). A covalent chemical bond is one in which A) electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged. B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms. C) outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. D) outer-shell electrons of one atom are transferred to the inner electron shells of another atom. E) the inner-shell electrons of one atom are transferred to the outer shell of another atom.
Answer:
B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms
The formation of a covalent bond involves the
Answer:
Atoms of non metals
Explanation:
Hope it helps!
why are metals not used on transistors and integrated circuits
Answer:
The usage of gold is generally avoided in semiconductor technology, since it acts as a deep-level trap and recombination center, i.e. charge carriers of opposite sign do recombine at Au defects in Si and get lost to the current.
I will make you brainlist answer this 1 question!
Direction: Answer the missing word
Answer:
i think it's higher for both u can try
Explanation:
12. A beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. Will it float in water,
which has a density of 1.0 g/mL?
Taking into account the definition of density and Archimedes' principle, the beginner bowling ball will float on the water.
But first it is neccesary to know that density is a quantity referred to the amount of mass in a certain volume of a substance or a solid object.
In other words, the density is the relationship between the weight (mass) of a substance and the volume that the same substance occupies.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
In this case, a beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. This is:
mass= 4.9 kg= 4900 g (being 1 kg= 1000 kg)volume= 5.4 L= 5400 mL (being 1L=1000 mL)Replacing in the definition of density:
[tex]density=\frac{4900 g}{5400 mL}[/tex]
Solving:
density=0.907 [tex]\frac{g}{mL}[/tex]
On the other hand, Archimedes' principle says that an object immersed in a liquid experiences an upward vertical force equal to the weight of the volume of the dislodged liquid.
The sinking or floating of an object is determined by its density with respect to that of the liquid in which it is submerged.
Considering water as the liquid where the object is submerged in this case, an object with a higher density than water will sink. In contrast, an object with a lower density than water will float.
In this case, considering that water has a density of 1 [tex]\frac{g}{mL}[/tex], the bowling ball for beginners has a lower density. This indicates that, having a lower density than water, the object will float.
In summary, the beginner bowling ball will float on the water.
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A ball exerts a force of 10 newtons on an area of 5 cm2 find the pressure with the formula : pressure = force/area
Answer:
2
Explanation:
10/5
HELP FAST PLEASE !!!!
Explanation:
See the table above. Periods at the side, metals at the top, non metals to the right, group to the right of that
The equation c = 2.95 g show how much it costs to buy gas at a gas station on a certain day. n the equation c represents the cost in dollars and g represents how many gallons of gas were purchased.
Write down at least four (gallons of gas cost) pairs that fit this relationship.
Which characteristics of sedimentary rocks allow them to preserve fossils?
O A. high heat, high pressure
O B. high heat, low pressure
O C. low heat, high pressure
O D. low heat, low pressure
Knowing an object's position requires which of the following? A. speed B. time C. displacement D. reference point
Knowing an object's position requires the (D) reference point
Reference point is the starting point use to locate another place or object. an object's position depends on reference point.
Position describes the distance and direction from reference point for an object. position of an object's is the location to the reference point.
Displacement is the difference between the initial position and the final position.
Speed is defined as the distance an object travels per unit time.
Time is defined as the duration of an object travels to cover a distance.
so according to all , reference point is needed to determine the position of an object's.
Thus, Knowing an object's position requires the (D) reference point
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H2SO4 + ………. → ZnSO4 + H2
Answer:
Zn
Explanation:
H2SO4 + Zn → ZnSO4 + H2
Zn is the answer.
Answer:
H2SO4+Zn =ZnSO4 +H2
this is the answer
Answer this question will give brainliest
Explanation:
cooling
communication
heating
motion
Answer:
I believe it's all of the above
Explanation:
Because heating and cooling can be done by an AC unit, which takes electricity. Communication also takes electricity, along with lighting (especially if we're talking light fixtures to light up homes). Not to mention motion, such as cars and other transportation uses, believe it or not, electricity.
Hope this helped, also please tell me if I'm wrong.
explain the periodic table law of element
Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”
Which of the following is an observation of a chemical property?
zinc reacts with hydrochloric acid
water boils at 100°C.
density of wood is 0.51 g/cm3
sand paper is roughly textured
what is the maximum time food can remain in the temperature danger zone
Answer:2 hours
This range of temperatures is often called the "Danger Zone." Never leave food out of refrigeration over 2 hours. If the temperature is above 90 °F, food should not be left out more than 1 hour. Keep hot food hot—at or above 140 °F.
Explanation: