Answer:
subscripts show the number of atoms of each type in the molecule.
Answer:
copper rally isn't useful like iron we have cars and all that but copper is made for like copper coins and wires
Explanation:
Iron is more reactive than copper as copper has less outer shells than iron so copper is less likely to react with another element as it has a stronger hold over the electrons.
Answer:
1.36x10^-19 J
Explanation:
First, we need to write the bohr's equation for the energy levels:
E(n) = -1/n² * 13.6 eV
Now, the question is asking this energy in Joules, so at the end we will use the conversion of eV to Joules.
As the energy level is 4, we just replace the value of n = 4 in the equation and solve for the energy in eV first:
E(4) = -1/4² * 13.6
E(4) = -0.85 eV
Now, the conversion for eV to Joules is the following:
1 eV = 1.6022x10^-19 J
Therefore, we just need to multiply the obtained value of Energy in eV with this factor, and we have the energy in Joules as required:
E = -0.85 * 1.6022x10^-19
E = 1.36x10^-19 J
This is the energy in Joules for an electron in the level 4.
Answer: 1
Explanation: This is true.
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