In the mid-1900s, most scientists used the Bohr atomic model to study atoms. In the Bohr model, electrons move in set paths around the atom's nucleus.In current atomic models, electron clouds are shown around the atom's nucleus. Electron clouds are regions where electrons are likely to be found.

What is a limitation of current atomic models as compared to the Bohr atomic model?

A. Current atomic models do not indicate the position of the nucleus within the atom's structure.

B. Current atomic models do not show how many electrons an atom has.

C. Current atomic models do not show where the electron is but only where the electron is likely to be.

The student selected the correct tile for the problem and doesn't need to flip the tile or add another tile. The problem is ready to be solved using the chosen tile. selected the correct tile for the problem and doesn't need to flip the tile or add another tile. The problem is ready to be solved using the chosen tile.

The correct answer is option D.

The student seems to be using a tile with the following information: "1.293 metric ton + 1000 kilograms/1 metric ton" to convert the mass of the container from metric tons to grams. Given that 1 metric ton is equivalent to 1000 kilograms, this tile can be used to perform the conversion. The problem statement provides the mass of the container as 1.293 metric tons, and the student wants to find the mass in grams.

A. The student chose the wrong tile to solve the problem.

This option is not correct. The tile selected by the student is appropriate for the given problem since it allows for the conversion of metric tons to kilograms, which is a necessary step to eventually convert to grams.

B. The student chose the correct tile but needs to flip the tile to make the units cancel.

This is not the case. The tile is already set up to correctly convert from metric tons to kilograms, and subsequently to grams. There is no need to flip the tile; it is correctly oriented for the given problem.

C. The student chose the correct tile but needs to add a second tile to solve the problem.

This is not necessary either. The single tile provided by the student allows for the complete conversion from metric tons to grams.

D. There is nothing wrong. The problem is ready to be solved.

This is the correct choice. The student's tile choice is appropriate, and no additional tile is required. They can proceed to solve the problem by multiplying the given mass of the container (1.293 metric tons) by the conversion factor on the tile (1000 kilograms/1 metric ton) to obtain the mass of the container in grams.

Therefore , from the given options the correct one is D.

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The question probable may be:

A student is trying to solve the following problem by selecting the tile shown. A container has a mass of 1.293 metric tons What is the mass of the container in grams?   1.293 metric ton + 1000 kilograms/ 1 metric ton  Which of the following statements is true? A. The student chose the wrong tile to solve the problem. B. The student chose the correct tile, but needs to flip the tile to make the units cancel. The student chose the correct tile,but needs to add a second tile to solve the problem D. There is nothing wrong. The problem is ready to be solved.  

Chemical formula of iron (III) sulfide is Fe₂S₃.

What is chemical formula?

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

We can write a chemical formula by following steps-

1. Write both the atoms that are present in the chemical compound.

2. Write the valencies of both the atoms that are present in the chemical compound.

3. Now cross multiply both the atoms such that 1 atom's valency goes to the subscript of another atom and vice versa.

Given,

oxidation state of Fe = +3

Valency of Fe = 3

Valency of sulphide ion = 2

When we cross multiply both the atom's valencies we get chemical formula of iron (III) sulfide as Fe₂S₃.

Therefore, chemical formula of iron (III) sulfide is Fe₂S₃.

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Answer:

b.

utilizing facts

Explanation:

redox reactions deal with the transfer of electrons from one species to another species

redox reactions are made of reduction reactions and oxidation reactions

reduction reactions are when electrons take in electrons and results in a decrease in the oxidation number

oxidation reactions are when electrons give out electrons resulting in an increase in the oxidation number

therefore correct answer for reduction reactions are

(3) gain electrons and have a decrease in oxidation number