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netineya [11]
2 years ago
6

An atom of an element is shown by the model. How is the model useful

Chemistry
1 answer:
Orlov [11]2 years ago
6 0

Answer:

I believe it is useful as it shows how electrons are distributed in the shells (energy levels) of an iron atom. An atom is the smallest particle of an element that can take part in a chemical reaction. It contains the nucleus and the shells (energy levels). the nucleus contains protons and neutrons while the shells contain electrons.

Explanation:

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Some plants make cones. Other plants make flowers. What is the purpose of flowers and cones
Semenov [28]

Answer:

Both cones and flowers produce seeds and are used for reproduction. ... The male cones release pollen which is carried by the wind to a female cone. A pollen tube is formed and pollen is transferred to fertilize the female cone's egg

5 0
3 years ago
Testbank, Question 098 In the reaction between an alkyne and Na metal in liquid ammonia, the role of Na is as a(n) ___________.
KonstantinChe [14]

Answer:

d. reducing agent

Explanation:

Na acts as a  reducing agent. A reducing agent is a substance whose function is to reduce or donate electrons to another, and by doing so it becomes oxidized.  We can see the mechanism of the reaction in the image attached below.

4 0
3 years ago
What best describes what models are used for?
monitta

Explanation:

is b or c but i think asnwer is b

3 0
3 years ago
What is the best description for a solution with a hydroxide-ion concentration equal to 1 x 10-4 m?
djverab [1.8K]

Answer:

This is a basic solution

Explanation:

To be able to provide a succint description of this solution, from the given parameters we can deduce the pH of the solution.

Given parameters:

Concentration of OH⁻ = 1 x 10⁻⁴M

Solution

          We knonw that pOH = -log₁₀[OH⁻]

                   pOH = -log₁₀ 0.0001 = - (-4) = 4

For an aqeous solution:

                  pH + pOH = 14

                  pH = 14 - 4 = 10

The pH of the solution has been derieved to be 10

This is a basic solution

7 0
3 years ago
What tissue is needed for the lungs organ
Vadim26 [7]

Answer:

The alveoli are responsible for the spongy nature of the lung. These alveoli are lined by flattened epithelial cells called pneumocytes with a single opening. The alveolar wall or septum is made up of three tissue components: surface epithelium, supporting tissue, and an extensive network of continuous capillaries

4 0
2 years ago
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