CHEMISTRY HIGH SCHOOL

Together, the protons and neutrons are called what?A)nucleinucleons
B)nuclear binding C)energy
D)nuclear forces
Together, the protons and neutrons are called what? A)nucleinucleons B)nuclear - 1

Answers

Answer 1
Answer:

Answer:The correct answer is 'nucleons'.

Explanation;

An atom is a structural unit of matter.It consist of three subatomic particles: electrons, protons, and neutrons.

Protons and neutrons are located at center of an atom where whole mass of an atom is concentrated that is in the nucleus of a atom.

Protons and neutron being located in nucleus are also known as nucleons.

Where as electrons revolve around the nucleus in different orbits inside an atom.

Hence, the correct answer is 'nucleons'.
Answer 2
Answer: I think B. is the correct answer i hope i helped

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Why might the earths oceans be described as one huge ocean

Answers

It might be described that way because all of the oceans on this planet are connected, therefore form one huge ocean.
This is probably because all the oceans help us by giving rain and all the oceans are connected with each other. Hope this helps you.

Describe your accuracy of your density measurements asummunf that you correctly identified your mystery solid and liquid

Answers

I don’t know the answer

Is this a good scientific question? “Is the lifespan of snowshoe hares, which are white in the winter and brown in the summer, affected by levels of winter snowfall?” A) Yes, because the question is specific. B) No, because the question cannot be tested in a laboratory. C) Yes, because the question has already been answered. D) No, because the question does not lead to a hypothesis.

Answers

The answer is: A) Yes, because the question is specific.

The scientific method is a process for experimentation that is used to explore observations (in this example color of snowshoe hares).

Steps of the scientific method:

1) ask a question about something that is observed.

2) do background research.

3) construct a hypothesis, an attempt to answer questions with an explanation that can be tested.

4) test of hypothesis.

5) analyze collected data and draw a conclusion.

The two main variables in an experiment are the independent and dependent variable.

Dependent variable is the variable being tested and measured in a scientific experiment, in this example lifespan of snowshoe hares.

Dependent variables depend on the values of independent variables. The dependent variables represent the output or outcome whose variation is being studied.


A) Yes, because the question is specific. 

Observe the nature changing around your home. You can observe plants, animals, and parts of your actual home as you begin to notice changes in matter. Collect data for two examples of changes in matter. Use the Changes in Matter observation questions to determine if your examples are physical or chemical changes.Your answer should include two examples, the types of changes observed, and evidence of how the examples were formed. You can use this format:

Example 1:

Type of Change:

Evidence:

Answers

Answer:

Example 1. One change I observed was when cooking, I needed to boil water. The water was later evaporated due to the increase of heat from the stove below the pot. Heat traveled and transferred from the stove to the pot then the water. This change is from liquid to gas.

Example 2. I was mixing sugar into my tea, the sugar dissolved into the tea. This is an example of dissolving a solid into a liquid. The tea took the properties of the sugar and turned the drink sweet.

Extra, taking a hot shower and steam leaves the shower. This change is of evaporation.

Explanation:

Hope this helps, even though it was late! <3 :)

The chemical reaction in which compounds break up into simpler Constituents is a.

Answers

decomposition its the answer

Answer:

decomposition

Explanation:

did the test and got it correct

A 6.25mg sample of Cr51 decays for 111 days. After that amount of time, 0.75mg remains. What is the half-life of Cr51?

Answers

To find the half-life (\( t_{\text{half}} \)) of Cr51, we can use the radioactive decay formula:

\[ N = N_0 \times \left(\frac{1}{2}\right)^{\frac{t}{t_{\text{half}}}} \]

Where:
- \( N \) is the remaining amount after time \( t \) (0.75 mg in this case)
- \( N_0 \) is the initial amount (6.25 mg)
- \( t \) is the time elapsed (111 days in this case)
- \( t_{\text{half}} \) is the half-life we're trying to find

We'll rearrange this formula to solve for \( t_{\text{half}} \):

\[ \frac{N}{N_0} = \left(\frac{1}{2}\right)^{\frac{t}{t_{\text{half}}}} \]

Taking the natural logarithm of both sides:

\[ \ln\left(\frac{N}{N_0}\right) = \frac{-t}{t_{\text{half}}} \times \ln\left(\frac{1}{2}\right) \]

Now, plug in the given values:

\[ \ln\left(\frac{0.75\, \text{mg}}{6.25\, \text{mg}}\right) = \frac{-111\, \text{days}}{t_{\text{half}}} \times \ln\left(\frac{1}{2}\right) \]

Solve for \( t_{\text{half}} \):

\[ t_{\text{half}} = \frac{-111\, \text{days}}{\ln\left(\frac{0.75\, \text{mg}}{6.25\, \text{mg}}\right) / \ln\left(\frac{1}{2}\right)} \]

Now, calculate this to find the half-life.

Using the provided formula to calculate the half-life (\( t_{\text{half}} \)), we get:

\[ t_{\text{half}} = \frac{-111\, \text{days}}{\ln\left(\frac{0.75\, \text{mg}}{6.25\, \text{mg}}\right) / \ln\left(\frac{1}{2}\right)} \]

Plugging in the values and calculating:

\[ t_{\text{half}} ≈ \frac{-111\, \text{days}}{-1.4978} \]
\[ t_{\text{half}} ≈ 74.24\, \text{days} \]

So, the half-life of Cr51 is approximately \( 74.24\, \text{days} \).
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