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Blizzard [7]
3 years ago
9

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect? Light is made up of extr

emely small particles. Particles that are emitted from a strip of metal are electrons. Shining light on a metal strip produces emissions. Energy of electrons depends on light’s frequency, not intensity.
Chemistry
2 answers:
Aliun [14]3 years ago
7 0

The correct answer is

Energy of electrons depends on light’s frequency, not intensity.

As per photoelectric effect, if we incident a light on metal surface it will results into emission of electron from it

if we increase the number of photons the number of electrons will increase however if we increase the frequency the number of photons will not increase

While if we increase frequency the energy of electrons will increase as

Energy of photon = Work function of metal + kinetic energy of electrons

Mice21 [21]3 years ago
4 0
Energy of electrons depends on light's frequency not intensity is the correct option.

Hope this helps, have a great day/night ahead!
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Citrus cleanser changes red cabbage to what color
Usimov [2.4K]

Answer:

I think it's green or blue...

7 0
3 years ago
Find the number of molecules equal to 1.46 molecules of CaCl2
stiv31 [10]

Answer:

8.7892x10^23

Explanation:

number of molecules equal number of moles times 6.02x10^23

6 0
3 years ago
3) Explain why elements in the same group<br>similar properties​
Alik [6]

Answer:

The elements of the same group have the same number of valence electrons, that is why they have similar properties

5 0
3 years ago
A wooden boat is discovered just south of the Graet Pyramid in Egypt had a Carbon-14 content of approximately 25% of that found
wolverine [178]

Because 25% is half of 0.5 and the half life of {}^{14}\text{C} is given as 5,715, the time it takes to reach this amount should just be double the half life: 11430 years.

However, in other cases the problem may not have easy numbers, so below is a more mathematical approach.

The half life formula is A=A_0*(\frac{1}{2} )^{\frac{t}{h} }.

Solving for t gives:

t=\frac{h*\ln(\frac{A}{A_0} )}{\ln(\frac{1}{2} )}

Given information:

A=0.25A_0\\h=5715\text{ yrs}

Plug in given values and solve for t.

t=\frac{5715 *\ln(0.25) }{\ln(\frac{1}{2} )} =11430 \text{ yrs}

With correct significant figures, this would be 11000 years.

6 0
3 years ago
URGENT!??! Please hurry ?!!!
Montano1993 [528]

Answer:

Table which was completed correctly is :

B) Answer choice G

Explanation:

Metals : Most of the elements in the periodic comes in the category of metal. They are found in left and middle of periodic table.

<u>List of metals </u>

Alkali : Li , Na , K ,Rb , Cs ,Fr

Alkaline : Be , Mg , Ca , Sr ,Ba ,Ra

Transition : Sc ,Ti ,V ,Cr ,Mn , Fe , Co, Ni Cu , Zn ,Y ,Zr ,Nb ,Mo ,Tc ,Ru , Rh , Pd , Ag , Cd , In , Sn, La ,Hf ,Ta ,W ,Re ,Os ,Ir ,Pt ,Au ,Hg

Non -Metals: Most of the p-block element are non metal. They are present in upper - right corner of the periodic table.

Non - metals : H , He , C ,N , O , F ,P ,S , Cl, Ar , Br , Xe ,At ,Rn,  

Metalloid : They show properties of both the metals and the non - metals.

Also called as semimetals

Metalloid : B ,Si ,Ge ,As ,Sb ,Te ,Po

<u>In table F </u>:

B = metalloid  , N = non metal ( wrong-match) , Ra  = metal ( wrong-match) , He = Non - metal ( wrong-match)

<u>In table G : Correctly matched </u>

I =  Non - metal , Ca = metal , Rb = metal , As = metalloid

<u>In table H</u>:

Ni = metal ( wrong-match) , C = metalloid ( wrong-match) , Mg = metal , Pb = Metal

<u>In table J</u>:

Cu = metal , Sb = Metalloid( wrong-match)  , S = non metal( wrong-match) ,Ne = non metal

6 0
3 years ago
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