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ivanzaharov [21]
3 years ago
6

What did bohr's model of the atom do that rutherford's model did not?

Chemistry
2 answers:
S_A_V [24]3 years ago
8 0

it focused on the location and energy of a electron

Lelu [443]3 years ago
7 0

Answer:

Bohr model proved that electrons orbit the nucleus in distinct energy levels.

Explanation:

Rutherford's atomic model proved that the nucleus of the atom is positively charged and the electrons are placed randomly outside the nucleus. But Bohr's atomic orbital explained the spectral lines of different elements by theorizing that the electrons orbit the nucleus in distinct orbits or energy levels. Upon accepting energy electrons jump from lower to higher energy levels and release energy when they return to a lower energy level from a higher energy level.

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Answer:

Explanation:

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If an atom of an element has a mass number of 45 and it has 20 neutrons in its nucleus, what is the atomic number of the

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3 years ago
What is the concentration of bromide, in ppm, if 12.41 g MgBr2 is dissolved in 2.55 L water.
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Answer:

concentration of bromide (Br⁻) = 4234 mg/L = 4234 ppm

Explanation:

ppm (parts per million) concentration is defined as the mass (in milligrams) of a substance dissolved in one liter of solution.

In our case we have:

mass of MgBr₂ = 12.41 g

volume of water (which is equal to the final solution volume) = 2.55 L

Now we devise the following reasoning:

if         12.41 g of MgBr₂ are dissolved in 2.55 L of water

then         X g of MgBr₂ are dissolved in 1 L of water

X = (1 × 12.41) / 2.55 = 4.867 g of MgBr₂

if in         184 g (1 mole) of MgBr₂ we have 160 g of Br⁻

then in   4.867 g of MgBr₂ we have Y g of Br⁻

Y = (4.867 × 160) / 184 = 4.232 g of bromide (Br⁻)

4.232 g of bromide (Br⁻) = 4234 mg of bromide (Br⁻)

concentration of bromide (Br⁻) = 4234 mg/L = 4234 ppm

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