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Inessa05 [86]
3 years ago
14

For electrons to be emitted from a metal surface, incident radiation with an energy in excess of the work function must be used.

What happens to the excess energy of the incident radiation?
Chemistry
1 answer:
Tamiku [17]3 years ago
3 0

Answer: The excess energy is converted into kinetic energy for the motion of the ejected electrons.

Explanation: It requires a certain energy to eject an electron from a metal surface. This energy is known as the work function (W), which varies from metal to metal. Electrons can gain energy by interacting with photons. If a photon has an energy at least as big as the work function, the photon energy can be transferred to the electron and the electron will have enough energy to escape from the metal. A photon with an energy less than the work function will never be able to eject electrons.

So, a particular amount of energy is used to break the barrier and match the work function of the metal surface & the remaining energy is converted into kinetic energy for the motion of the ejected electrons.

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A molecular covalent substance (such as co2) has a low melting point because the covalent bonds that hold the molecules together
Leona [35]

A molecular covalent substance (such as co2) has a low melting point because the covalent bonds that hold the molecules together are weak and do not require much energy to break:- False.

What are covalent bonds ?

An electron transfer that leads to the formation of electron pairs between atoms is known as a covalent bond. When atoms share electrons, a stable balance of the repulsive and attractive forces among them is known as covalent bonding. These electron pairs are also known as bonds or shared pairs.

It is a molecular compound, which is a mixture of at least two atoms—the smallest building blocks of matter—joined by a covalent bond. These atoms are joined by a covalent bond, which is formed when electrons are shared.

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6 0
1 year ago
What is one factor that contributes to seasons occurring in Pennsylvania?
Alenkinab [10]
The tilt of Earth on it's axis
6 0
3 years ago
Consider the balanced equation below.
Karo-lina-s [1.5K]

The correct option is (a) H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

<h3>What is molar Ratio ?</h3>

Molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation

the balanced equation is as follows ;

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

molar ratio can be determined by the coefficients of the compounds in the balanced reaction.

coefficient is the number in front of the chemical compound

coefficients for the compounds in this reaction are as follows ;

  • H₂S - 2
  • O₂ - 3
  • SO₂ - 2
  • H₂O - 2

therefore, correct option is (a) H₂S:SO₂ = 2:2 and O₂:H₂O = 3:2

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4 0
2 years ago
Any reaction that absorbs 150 kcal of energy can be classified as.
N76 [4]

Answer:

The Answer should be Endothermic reaction

Explanation:

Reactions in which energy is absorbed are called Endothermic reactions.

7 0
2 years ago
PLEASE HELP!! Tell me the IUPAC name of the following compounds:
leonid [27]

The IUPAC rules are

a) Find out the longest chain of carbon in the given organic compound

b) We will name the longest chain.

c) We will identify the main functional group and will assign a suffix to the compound.

d) We will number the carbons in the longest chain selected so that the attached groups attain lowest numeral as substituent

e) We will name the side groups or chains.


4 0
3 years ago
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