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kenny6666 [7]
3 years ago
13

An atom of an element has 54 protons. Some of the elements atoms have 77 neutrons, while other atoms have 79 neutrons. What are

the atomic numbers and mass numbers of the two types of atoms of this element?
Chemistry
1 answer:
Alja [10]3 years ago
7 0

Answer:

The atomic numbers of both are 54 while the mass numbers are 131 and 133 respectively.

Explanation:

- The number of protons = Atomic number. So, if the atom has 54 protons and it remained unchanged, then the two types of atoms of this element both have atomic numbers of 54.

- On the other hand, mass number is the sum of protons and neutrons

So, if type 1 has protons = 54 and neutrons = 77: mass number = 54 + 77 = 131

if Type 2 has protons = 54 and neutrons = 79: mass number = 54 + 77 = 133

(Since the possibility of atoms of the same element to have different mass numbers but the same atomic number is called isotopy). The two types of atoms with mass numbers 131 and 133 described are isotopes.

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2 years ago
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5 0
3 years ago
4. Describe the movement of the water molecules at cold temperatures.
kenny6666 [7]

Answer:

Point out to students that molecules of hot water are moving faster and are slightly further apart. The molecules of cold water are moving slower and are a little closer together. If students do not notice a difference, move the slider all the way to the left again and then quickly to the right.

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3 0
2 years ago
What is the mass of 3.00 moles of magnesium chloride, MgCl2? Express your answer with the appropriate units.
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Then, the mass of 3 mol of MgCl would be:
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7 0
3 years ago
Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the
borishaifa [10]

Answer:

Kc = [C2H5OH]/{[C2H4][H2O]}

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Explanation:

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