1. De Broglie\'s insight into wave-particle duality of matter led to... I. the u
ID: 911225 • Letter: 1
Question
1. De Broglie's insight into wave-particle duality of matter led to...
I. the understanding that the wave like properties of small particles like electrons are important.
II. the recognition that the energy of electromagnetic radiation is quantized.
III. an explanation of the photoelectric effect.
a) I only
b) III only
c) I and II
d) II and III
e) I, II, and III
2. Which of the following statements describes the energy changes when this reaction occurs. Cl2 (g) = 2Cl (g)
a) Energy must have been added to the system because bonds are broken.
b) Since energy can neither be created nor destroyed the energy of the products must be equal to the energy of the reactants.
c) The potential energy is stored in the reactant molecule is released when the reactant is converted into atomic gases.
d) When energy was added to Cl2 it caused the compound to boil and the bonds to break.
Explanation / Answer
1) a) I only
beacuse
according debroglie all material particles in motion possess wave characterstics.he was explaine with the matahmatical expression
lamda = (h/mv)
the remaining two explanined based on the plank quantum theory.
2)
a) Energy must have been added to the system because bonds are broken.
because when we supply the energy then ony the bond can broken and they are concerted into gaseous atoms.
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