Energy of a photon = hc/λ
3.65 x 10^-19 = 6.626 x 10^-34 x 2.99 x 10^8/λ
λ = 6.626 x 10^-34 x 2.99 x 10^8 / 3.65 x 10^ -19
= 5.42 x 10^-7 m.
Hence wavelength of photon is 5.42 x 10^-7 m.
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3) Answer is: because elements have different emmision spectrum.
Emission spectrum of a chemical element is the spectrum of frequencies emitted due to an atom making a transition from a high energy state to a lower energy state. Each element's emission spectrum is unique.
4) Answer is: lithium chloride and sodium chloride do not have similar colors.
Lithium ion has red and sodium ion has yellow emission spectrum.
5) Answer is: because metals have valence electrons in different energy shells.
Each transition has a specific energy difference.
6) Answer is: salts of alkaline and earth alkaline metals.
For example barium chloride gives green light.
Answer:
6 C O 2 + 6 H 2 O + Δ → C 6 H 12 O 6 + 6 O 2
Explanation:
The Δ symbol denotes added energy, here in the form of sunlight. Strong C = O , and O − H bonds have been broken, and this bond cleavage is only partially energetically compensated by the formation of C − H and O = O bonds. Hence the reaction is endothermic (energy input on LHS). Note that the reaction is balanced with respect to mass and charge (says he, checking to see whether it is indeed balanced!).
Answer:
Ecosystems have lots of different living organisms that interact with each other. The living organisms in an ecosystem can be divided into three categories: producers, consumers and decomposers. They are all important parts of an ecosystem. Producers are the green plants.
Explanation:
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Answer:
Fe.
Explanation:
- The element which is oxidized is the element that losses electrons and its oxidation state be more positive.
- The element which is reduced is the element that gain electrons and its oxidation state be more negative.
<em> Fe goes from + 2 to +3, so, it is the element that is oxidized.</em>
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