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Llana [10]
3 years ago
6

A student hypothesizes that since elements in the same row have the same number of energy levels, they should behave the same in

chemical reactions. Explain why you agree or disagree with this hypothesis.
i'm having a bit of trouble with this question :P
anyone know?
Chemistry
2 answers:
zhenek [66]3 years ago
8 0

Explanation:

When we move across a period then there occurs an increase in the number of electrons of atoms from left to right. These electrons are added to the same sub-shell.

For example, elements present in row 2 will have electrons present in n = 2 which is the highest energy level for row 2 elements.

Hence, there are different number of valence electrons present in the elements of a row.

Whereas when we move down a group then elements have same number of valence electrons. As a result, they tend to show similar chemical properties.

But since, there are no same number of valence electrons in the elements of a row. Hence, they do not show similar chemical properties. Therefore, elements of a row do not behave same in chemical reactions.

Thus, we can conclude that we disagree with the hypothesis given by the student.  

Genrish500 [490]3 years ago
3 0
I disagree with this hypothesis, because, the rows only support how many valence electrons there are, but do not support the chemical reaction. However, the columns do. Each column on the periodic table is one group. These groups share similar chemical properties, and react similarly in reaction. In conclusion, the hypothesis is incorrect.
Hope this helped.
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What is the total number of atoms present in 5Na,PO.?
denis23 [38]

Answer:

3.01×10²⁴ atoms

Explanation:

Our compound is the Na₃PO₄

Sodium phosphate.

We assume, we have 5 moles of the mentioned salt.

1 mol of anything contains 6.02×10²³ atoms.

That's the Avogadro's number. The conversion is:

5 mol . 6.02×10²³ atoms /1mol = 3.01×10²⁴ atoms

6 0
3 years ago
Determine which categorization is most appropriate for mud
Dmitry [639]
Flat character -we don’t know much about mud other that it’s describing it doesn’t have feelings it doesn’t develop
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4 years ago
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Add more drink mix until you notice a color change. Have you increased or decreased the concentration? (Higher number means a hi
valina [46]

Answer:

Increased the concentration

Explanation:

Complete Question

Open the simulation by pushing the play button.  Begin by dragging the concentration tester overto the liquid and add drink mix until the concentration reaches approximately 2.oo mol/L.  This means there are 2.00 moles of the drink mix in 1 Liter of the solution. Add more drink mix until you notice a color change. Have you increased or decreased the concentration? (Higher number means a higher concentration).

Solution

Drink mix is basically the solute which is added to solvent i.e water.

The higher is the amount of drink mix in the solvent, the higher is the concentration of the solute and hence darker is the color of the drink.

Hence, in the case the concentration of the drink has been increased.

3 0
4 years ago
Geef de systematische naam van P2S3
Tresset [83]

The question is: Give the systematic name of P_{2}S_{3}.

Answer: The systematic name of P_{2}S_{3} is diphosphorus trisulfide.

Explanation:

As the chemical formula of given compound is P_{2}S_{3}. This sows that there are two phosphorus atoms so a prefix "di" will be added before the name of phosphorus atom.

Whereas there are three sulfur atoms present here. So, a prefix "tri" will be added before naming the sulfur atom. As sulfur is the anion so a suffix '-ide' will be added to its name.

Hence, name of the compound P_{2}S_{3} is diphosphorus trisulfide.

Thus, we can conclude that the systematic name of P_{2}S_{3} is diphosphorus trisulfide.

4 0
3 years ago
How many atoms are there in 8.08 moles of carbon dioxide
sertanlavr [38]

Answer:

145.97×10²³ atoms

Explanation:

Given data:

Number of moles of CO₂ = 8.08 mol

Number of atoms of CO₂ = ?

Solution:

1 mole of CO₂ contain 1 mole C atom.

8.08 mole contain 8.08× 1 = 8.08 mole of C atom.

1 mole of CO₂ contain 2 moles of O atom.

8.08mole contain 8.08×2 = 16.16 mole of O atom.

Total number of moles of atoms = 8.08 mole + 16.16 mole

Total number of moles of atoms = 24.24 mol

Number of atoms of CO₂:

1 mole of any substance contain 6.022×10²³ atoms.

24.24 mol ×6.022×10²³ atoms / 1 mol

145.97×10²³ atoms

7 0
3 years ago
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