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3 years ago

The number of positive charges in the nucleus of an atom is equal to:

Chemistry

2 answers:

lidiya [134]3 years ago

7 0

Answer: The correct answer is Option 2.

Explanation:

For the given options:

Option 1: Mass number is defined as the sum of number of neutrons (having neutral charge) and number of protons.

Mass number = Number of protons + Number of neutrons

Option 2: Atomic number is defined as the number of protons (having positive charge) or number of electrons (having negative charge).

Atomic number = Number of protons = Number of electrons

Option 3: Avogadro's number is defined as the number of atoms that are present in 1 mole of an atom. The value of it is $6.022\times 10^{23}$

Option 4: Atomic mass is defined as the sum of mass of neutrons and mass of protons.

From the above information, the number of positive charges in the nucleus of an atom is equal to its atomic number.

Thus, the correct answer is Option 2.

frutty [35]3 years ago

3 0

The answer is 2) Its atomic number because that’s what the protons represent

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Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons.

Monica [59]

I do not believe you're asking this...
OK. Sulfur has a total of 24 isotopes. Every isotope has 16 protons and the number of neutrons ranges from 10 to 33 inclusive.
Phosphorus has a total of 23 isotopes. They have 15 protons, and between 9 and 31 neutrons inclusive. So here we go.

S-49
S-48
S-47, P-46
S-46, P-45
S-45, P-44
S-44, P-43
S-43, P-42
S-42, P-41
S-41, P-40
S-40, P-39
S-39, P-38
S-38, P-37
S-37, P-36
S-36, P-35
S-35, P-34
S-34, P-33
S-33, P-32
S-32, P-31
S-31, P-30
S-30, P-29
S-29, P-28
S-28, P-27
S-27, P-26
S-26, P-25
P-24

If you're looking for STABLE isotopes, then the list is much smaller.
S-36
S-34
S-33
S-32, P-31

6 0

4 years ago

Read 2 more answers

Show your work and include answer with units. How many atoms in 55 grams of magnesium

Georgia [21]

Answer:

1.38 x $10^{24}$ atoms

Explanation:

To get grams to atoms/molecules/particles we need to first convert grams > moles > atoms. This also applies in the other direction, where you have moles as that stepping stone.

Some key information we need:

Magnesium's molar mass= 24g/mol

Avogadro's Number= 6.022 x $10^{23}$ atoms

Where there is 1 mol per 6.022 x $10^{23}$ atoms

*This maybe be something you want to memorize.

Grams to moles using molar mass , then to atoms using avogadro's number.

55g Mg x $\frac{1 mol}{24g/mol}$ x $\frac{6.022 x 10^{23} atoms }{1 mol}$ = 1.38 x $10^{24}$ atoms

8 0

3 years ago

What are the structural components of a triglyceride?

levacccp [35]

The structural components of a triglyceride is a molecule of glycerol and 3 fatty acids because one triglyceride is made up of glycerol that is made up of 3 different fatty acids.

Hope this helps!

3 0

3 years ago

Alcohol is one of the most widely used drugs in the world. It is used by more young people in the United States than tobacco or

klasskru [66]

Answer:

TRUE

Explanation:

People in United States especially the young people consumes more alcohol than any other drugs in the world. According to a report, about 24 millions of people over the age 18 consumes an average of 74 alcoholic drinks in a week. In the United States, they use it more as a recreational drug other than tobacco or certain illicit drugs.

Hence the answer is TRUE.

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3 years ago

Which of these actions is the BEST evidence that waves can cause objects to move?

Thepotemich [5.8K]

The answer is C: A surfer rides back to the beach on his surf board.

All the others are examples of people doing stuff to the water, C is an example of the water moving something, in this case the water is moving a surfer and his surf board.

8 0

4 years ago

Read 2 more answers