CHEMISTRY HIGH SCHOOL

Which of the following is true about the concept of half-life?A. Half-life measures the rate of decay of a radioisotope.
B. The shorter the half-life, the more dangerous the radioisotope.
C. Half-life predicts which atoms in a radioactive sample will decay.

I think it`s A?

Answers

Answer 1

Answer: Its A. because it measures the rate of the decay of the isotope

Answer 2

Answer:

it is A Half-life measures the rate of decay of a radioisotope.

I took the test

Related Questions

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The energy carried by light waves is taken in by particles of matter.What type of wave interaction does this statement describe?AabsorptionВ.reflectedC.refractionO D.scattering
How do synthesis reactions and a decomposition reactions differ
What is added within the Shielded Twisted Pair Cable (STP) to reduce the incident of crosstalk?
Which statement most accurately describes the behavior of a catalyst? (A) A catalyst increases the ∆G of a reaction and hence the forward rate. (B) A catalyst reduces the ∆H of a reaction and hence the temperature needed to produce products. (C) A catalyst reduces the activation energy for a reaction and increases the rate of a reaction. (D) A catalyst increases the equilibrium constant and final product concentrations

Which statement is true concerning the reaction N(g) + N(g) → N2(g) + energy? A bond is broken and energy is absorbed.
A bond is broken and energy is released.
A bond is formed and energy is absorbed.
A bond is formed and energy is released.

Answers

Answer:

A bond is formed and energy is released.

Explanation:

Given a reaction equation, the elements which we have on the left side of the arrow are called the reactants and the elements which we have on the right side are called the products.

In this exercise, the reactants are N(g) and N(g) and the products N2(g) and energy.

After the reaction took place, N(g) and N(g) disappeared and instead N2(g) was formed. We can conclude that a bond was formed between both N(g).

Also, in the products certain amount of energy was released (because we have it on the products side)

The correct option is ''A bond is formed and energy is released''

Which is a function of cyclins? Cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle. Cyclins are glycoproteins that repair DNA in the beginning of cell cycle. Cyclins are proteins that regulate when and how often a cell divides.

Answers

The correct answer for the question that is being presented above is this one: "Cyclins are proteins that regulate when and how often a cell divides." The function of the cyclins is that it helps regulates during cell division. They are proteins, basically.

Which of the following are examples of cations? A. SO42- B. HCO3- C. Cl- D. HPO42- E. Ca2+

Answers

D or b but I don't know for sure

A neutral atom must have the same number of neutrons and electrons true or false

Answers

False .... A neutral atom needs the same number of protons and electrons

In the chemical reaction below, what Is the product? C+o2 -> Co2

Answers

Answer:

CO₂

Explanation:

The product of the reaction is CO₂.

In a chemical reaction, the product is the substance usually found on the right hand side of the expression.

Reaction equation is given as;

C + O₂ → CO₂

In this reaction, C and O₂ are the reactants

CO₂ is the product of the reaction.

This reaction is called a combination reaction in which two species combines to give a product.

Which of the following is NOT a pure substance?a. solution
b. element
c. molecule
d. compound

Answers

Answer:

A) Solution

Explanation:

Final answer:

A solution is not a pure substance, while elements, molecules, and compounds are examples of pure substances. The correct option is A.

Explanation:

The correct answer is a. solution. A solution is a mixture of two or more substances, so it is not a pure substance. Examples of solutions include saltwater and sugar water. On the other hand, elements, molecules, and compounds are all examples of pure substances. An element is a substance that cannot be broken down into simpler substances, such as gold or oxygen. A molecule is a combination of two or more atoms held together by chemical bonds, like water (H₂O) or carbon dioxide (CO₂). Lastly, a compound is a substance made up of two or more different elements chemically bonded together, like table salt (NaCl) or water (H₂O).