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4 years ago

What is the electron configuration of an element with an atomic number of 9?

Chemistry

1 answer:

Bezzdna [24]4 years ago

8 0

1s^2 2s^2 2p^5

First shell is s with capacity 2, second is p with capacity 6

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Be sure to answer all parts. Acetone is one of the most important solvents in organic chemistry. It is used to dissolve everythi

Kazeer [188]

Answer:

Half life = 79.67 sec

Explanation:

Given that:

k = $8.7\times 10^{-3}\ s^{-1}$

The expression for half life is shown below as:-

$t_{1/2}=\frac{\ln2}{k}$

Where, k is rate constant

So,

$t_{1/2}=\frac{\ln2}{8.7\times 10^{-3}\ s^{-1}}$

$t_{1/2}=114.94252\ln \left(2\right)\ sec=79.67\ sec$

Half life = 79.67 sec

6 0

3 years ago

Which of the following is true for a chemical reaction at equilibrium?

victus00 [196]

Answer:

youre gonna have to include the answers for me to help

Explanation:

7 0

2 years ago

What can a drop of liquid mercury be described as?

stich3 [128]

In impure substance that is reactive

7 0

3 years ago

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PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!

Pani-rosa [81]

Answer:

b) a stickleback's aggressive behavior

Explanation:

Sticklebacks are small carnivores that live off of small animals and larvae. An adapted behaviour would be changes in their attitudes and behaviours as compared to the characteristics are given to them by the Creator.

For example lions nature is to hunt, spiders nature is to build nests whereas birds nature is to build nests. But being aggressive is not one of Sticklebacks natural instincts. This is something they have adapted with time due to external factors.

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4 years ago

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Science always begins with what?

tiny-mole [99]

Step 7- Communicate. Present/share your results. Replicate.

Step 1- Question.

Step 2-Research.

Step 3-Hypothesis.

Step 4-Experiment.

Step 5-Observations.

Step 6-Results/Conclusion.

3 0

3 years ago