A chemistry student is recording the electric charges of some atoms. Use the results in the chart to answer the following questions.Atom Electric Charge
Carbon −4
Nitrogen +5
Oxygen −2
Part A:
Write an equation to find the difference in electric charge between the Nitrogen atom and the Oxygen atom.

Part B:
Using the equation you wrote in Part A, what is the difference in electric charge between the two atoms?

Answer:

The Plum Pudding Model and the Nuclear Atomic Model were early atomic models that helped explain the structure of an atom. Here are sketches and key points associated with each model:

**Plum Pudding Model:**

**Key Points:**

1. Proposed by J.J. Thomson in 1904.

2. The atom is considered a positively charged sphere.

3. Electrons (negatively charged particles) are embedded randomly throughout the positively charged sphere.

4. This model suggested that the atom is mostly empty space.

**Nuclear Atomic Model:**

**Key Points:**

1. Proposed by Ernest Rutherford in 1911.

2. The atom consists of a tiny, dense, positively charged nucleus at the center.

3. Electrons orbit the nucleus in specific energy levels or shells.

4. Most of the atom's mass is concentrated in the nucleus.

5. The nucleus is surrounded by a vast amount of empty space.

Here are simplified sketches of these two atomic models:

**Plum Pudding Model:**

```

                O

              /   \

            /       \

          /           \

        /               \

   +  +  +  +  +  +  +  +  +

   (Positively Charged Sphere)

```

In this sketch, the "+" symbols represent the positive charges distributed throughout the sphere, while the "O" symbols represent the negatively charged electrons scattered throughout.

**Nuclear Atomic Model:**

```

            Nucleus (+)

            /      |      \

           /       |       \

          /        |        \

    - - - - - - - - - - - - - - -

    |            |             |

    |  Electron  |   Electron  |

    |   Orbit    |    Orbit    |

    |  (e-)      |    (e-)     |

```

In this sketch, the nucleus at the center contains positively charged protons and neutrons (not shown). Electrons are shown orbiting the nucleus in discrete energy levels or shells.

These models played a crucial role in understanding atomic structure, but they were later refined and replaced by the modern quantum mechanical model, which provides a more accurate description of how electrons behave within the atom.

Explanation:

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Answer:

D.  a planet

Explanation:

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Answer:

Moles of Carbon in the product = 0.183 mol

Explanation:

Complete combustion of an organic compound in the presence of excess oxygen will give carbon dioxide (CO2) and water vapour(H2O).

Equation of reaction

CxHyOz(s) + (2x + y/2 - z)/2 O2(g) --> x CO2(g) + y/2 H2O(l)

Moles of products

CO2

Molar mass of CO2 = 12 + (16*2)

= 44 g/mol

n(CO2) = 8.07/44.0

= 0.183 mol

One compound of CO2 has 1 Carbon atom and 2 Oxygen atom.

So if we have,

0.183 moles of carbon dioxide then

0.183 moles of carbon.

The mass of carbon in the product, m = 0.183*12

= 2.20 g

H2O:

Molar mass of H2O = (1*2) + 16

= 18 g/mol

Number of moles of H2O =

= 3.3/18

= 0.183 mol

One compound of H2O has 2 Hydrogen atom and 1 Oxygen atom.

0.183 moles of water then we also have

= 2*(0.183)

= 0.367 moles of hydrogen in the sample.

The mass of hydrogen in the compound, m

= 0.367*1

= 0.367 g

Adding these two values together will give us the mass of our compound that C and H;

2.2 + 0.367

= 2.567 g

So for the Oxygen,

5.5 g - 2.567

= 2.933 g

Moles of Oxygen;

Molar mass of O = 16 g/mol

= 2.933/16

= 0.183 mol

There are 0.030 moles of carbon  in the original sample as per the mole concept.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is given by the formula,

The given values are,mass=

molar mass=

Substitution of values in formula gives,

Thus, there are 0.030 moles of carbon  in the original sample as per the mole concept.

Learn more about mole concept,here:

brainly.com/question/31123980

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Answer : Option B) Plant stomata opening and closing to maintain homeostasis.

Explanation : Claude Bernand was a French Physiologist who first discovered about "homeostasis" which is defined as the controlled stability of the internal milieu, or internal environment, of cells and tissues in plants.

In plants stomatal opening and closing was done for maintaining homeostasis with the external and internal plant environment.

Answer:

B) plant stomata opening and closing to maintain homeostasis