The line spectra of an atom offers conclusive evidence that electron energies are quantized.
Neils Bohr showed that electrons in an atom can absorb or emit energy when they move from one energy level to another. This principle is the basis upon which the spectra of atoms is built.
The true statements about the atomic spectra is;
- The line spectra of elements are evidence that electron energies are quantized
- Energy is emitted from atoms as they move from higher energy levels to lower energy levels
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Answer:
Empirical formula:
Fe₂O
Subscript of iron in empirical formula is 2.
Explanation:
Empirical formula:
It is the simplest formula that gives the smallest whole number ratio between the atoms of elements present in a compound.
Given data:
Mass of iron = 87.47 g
Mass of oxygen = 12.53 g
Empirical formula = ?
Solution:
Number of gram atoms of iron = 87.47 /55.845 =1.57 grams atoms
Number of gram atoms of oxygen = 12.53 / 16 = 0.78 grams atoms
Atomic ratio:
Fe : O
1.57/0.78 : 0.78/0.78
2 : 1
Fe : O = 2 : 1
Empirical formula:
Fe₂O
Subscript of iron in empirical formula is 2.
1j
20j
100j
10,000j
2kj
200kj
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Answer:
It is a homogenious mixture because it has the same consistency throughout. It is just a frozen block of juice. Think about it. It also has the same substance throughout.
Explanation: