CHEMISTRY MIDDLE SCHOOL

What is the shortest half life

Answers

Answer 1

Answer:

Answer:

Hey!

Your answer is element A

Explanation:

Using the graph, the element A's emission of radioactive particles ends approximately after 6 years...

A HALF-LIFE IS "HALF" OF THAT TIME PERIOD!

So if the radiation goes for 6 years the half-life is 6 divided by two which gives you 3 years!

The rest however have a longer half-life...

Because they all end at 14 yrs so their half-life in 7 years!

HOPE THIS HELPS!!

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Explain how the scientific method helps scientists.

Answers

As scientists work hard for the results, they may get biased and may sometimes come up with an answer that is based on that. In order to avoid such circumstances, scientific method is put into practice.

Explanation:

Personal preferences can some times affect a scientific answer. That is not desirable as the experiments will be repeated by different individuals and the same results should be obtained.
That leads to the importance of documentation of systemic observation, formation of hypothesis and the experimentation to confirm the results, which is the scientific way of coming up with the answer to a scientific problem.
Scientific methods thus helps in bringing more credibility to findings of the scientists and can be repeated by others to obtain the same results.

A force that keeps objects in motion from going on forever

Answers

It's called "inertia". Inertia keeps an object from going by using friction.

First off, most subjects relating to 'force' is usually physics.
Secondly, There is no force that acts forever.

However, because of the law of inertia (I know, stupid and long name), if you make something move and you just leave it (without anything like oxygen, friction, etc.,. trying to stop the object), it will move forever.

The softest mineral in the Mohs hardness scale is?

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the talc

have a goed day

What is the best thing to study in Antartica?

Answers

The animals, climate, weather.

The most basic is the weather and animals. But the soil and ice also tells about the past a lot.

Why does tying the arm above the elbow make veins in the forearm more visible?

Answers

The tying results in the more visible veins of upper arms due to blood flow restriction.

Veins are the part of circulatory system in the body, that functions to carry deoxygenated blood from different parts of the body to the heart.

The venipuncture has been the process of insertion of drugs or chemicals in a body through vein. The veins of the upper arm has been tied to make them more visible.

The upper arm veins are more visible as there has been blood flow restriction in the veins by tying that results in the bulging out of the vein.

For more information about veins, refer to the link:

brainly.com/question/9726668

.Calculate the number of moles of each component element in the compound.