CHEMISTRY MIDDLE SCHOOL

Protons are positively charged and repel other protons. Which other particle is found in the nucleus and separates protons so that the strong force can hold the nucleus together?A) electrons
B) neutrons
C) protons
D) quarks

Answers

Answer 1
Answer:

Explanation:  THE ANSWER IS B,NEUTRONS..I TOOK THE TEST!!! DO NOT LISTEN TO THE 1ST ANSWER! IT IS B!!
Answer 2
Answer:

Answer:

b

Explanation:

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What is a group of atoms bonded together

Answers

A group of atoms bonded together is called a molecule. I hope this helped. :)
the group of atoms held together by covalent bonds is called a molecule

30. The of an object is different on every
planet in the solar system.

Answers

Answer:

Weight

Explanation:

  • The weight of an object is different on every planet in the solar system.
  • Weight is the gravitational pull of an object towards the surface of a planet.
  • It is measured in Newtons, using a spring balance .
  • Weight changes from one place to another depending on the gravitational acceleration of a surface.
  • For example, the weight of an object on the surface of the earth is different from the weight of the same object on the surface of the moon.
  • Mass of an object, on the other hand, remains constant and is the same on every planet in the solar system.

Answer:

weight

Explanation:

Please helpRadiocontrast dyes are considered safe because the isotopes have short half-lives and the isotopes coat the gastrointestinal tract and are not absorbed by normal tissue. If a patient ingests 10.0 mg of iodine, how long until the iodine-134 is 99% out of the patient's system if the half-life of iodine-134 is 52.6 minutes?

Answers

In 52.6 mins the 10 mg of iodine will be divided by its half-life which is 2 it will become 5 mg  (in 52.6 minutes ) and same procedure will be followed until it reach 99% out of the patient's system.

The answer is 368 minutes will it takes the iodine to be absorbed in one's system.

Hydrogen does not occur in free state on the earth. Why?​

Answers

Answer:

ExplanatioHydrogen cannot exist in free state as hydrogen needs an electron to attain stability. If an element does not attain stability it cannot exist on its own. In Sun there are large number hydrogen atoms and helium atoms present this creates a lot of energy and nuclear fusions are occured. Gases that attain stability can normally exist on their own. E.g. Argon, Neon, Helium, Krypton and Xenon. Gases that cannot exist on their own are:

H2

O2

N2

Hope it helped a little......

When energy changes from one form to another, some energy is always changed to A. sound. B. light. C. electricity. D. heat.

Answers

The answer is D) Heat

When energy changes from one form to another, some energy is always changed to heat.

Please mark a brailiest ^-^

When energy changes from one form to another, some energy is always changed to Heat.

Which means the answer is D. (Heat)

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Happy Friday, buddy!

A student in science class observes a cell under the microscope and sees an organelle that only appears in plant cells. What is the organelle?

Answers

The organelle is the chloroplast. While plant cells will also have a cell wall, the cell wall is not considered an organelle.
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