1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KonstantinChe [14]
2 years ago
12

Which phrase describes the decay modes and the half-lives of K-37 and K-42?

Chemistry
2 answers:
True [87]2 years ago
7 0
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Among the choices the phrase describes the decay modes and the half-lives of K-37 and K-42 is different decay modes and different half-lives 
andrew11 [14]2 years ago
6 0

Answer: (3) different decay modes and different half-lives

Explanation: Potassium-37 and Potassium-42 have the same number of protons  but different numbers of neutrons i.e. they have same atomic number but different mass number. They are isotopes. Thus K-37 and K-42 have different decay modes

K-37 is positron decay and K-42 is beta decay.

_{19}^{37}{\textrm {Kr}}\rightarrow _{18}^{37}{\textrm {Ar}}+_{+1}^0{\textrm {e}}

_{19}^{42}{\textrm {Kr}}\rightarrow _{20}^{42}{\textrm {Ca}}+_{-1}^0{\textrm {e}}


K-37 has a half life of 1.23 seconds and K-42 has a half life of 12.4 hrs.

Thus they have different decay modes and different half lives.

You might be interested in
Which are different structures of the eye? Select four options.
Setler [38]

Answer:

Pupil, Cornea, Retina, and Lens

Explanation:

5 0
3 years ago
Read 2 more answers
What type of reaction occurs without the addition of heat?
maria [59]

The type of reaction that occurs without the addition of heat is called spontaneous reaction. That is option D.

<h3>What is spontaneous reaction?</h3>

Spontaneous reaction is defined as the reaction where by new substances are formed naturally without the addition of extra energy in the form of heat.

Therefore, the type of reaction that occurs without the addition of heat is called spontaneous reaction

Learn more about heat here:

brainly.com/question/13439286

#SPJ1

5 0
2 years ago
A) State the Law of Conservation of Matter.​
Mariulka [41]

Answer:

matter can either be created nor destroyed but can be transmitted fromone state to another state

4 0
2 years ago
Which of the following is true about an abiotic resource?
aev [14]

Answer:

B. It is a nonliving resource.

Explanation:

The definition of abiotic is "nonliving," and examples of abiotic resources may include soil or water.

5 0
3 years ago
How can equilibrium of a closed system chemical reaction be disturbed? Select all that apply.
charle [14.2K]

The correct answers are :

Changing the volume of the system.

Changing the temperature of the system.

Equilibrium will remain unaffected if the concentration of products and reactants are kept the same, and the temperature of the system is kept constant.

As the system is closed, we cannot add or remove products or reactants.

Change in temperature will shift the chemical equilibrium towards the reactant or product depending on whether the reaction is exothermic or endothermic.

Also change in volume  will shift the chemical equilibrium of a chemical reaction if the reactants or products or both are gases.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following groups is not reactive? Circle all that apply.
    10·1 answer
  • Why are metals generally good conductors of electricity? 1. metals have more protons. 2. metals have strong bonding with other a
    10·2 answers
  • What are the signs given to the electrodes in both the voltaic and electrolytic cells? What reaction (oxidation or reduction) is
    12·1 answer
  • How many moles of oxygen can be formed from 250 grams of aluminum oxide
    6·1 answer
  • Determine the length of the object shown <br>A. 97.8 mm<br>B. 97.80 mm<br>C. 97 mm<br>D. 98 mm​
    15·1 answer
  • Please help with this chemistry question above!
    6·1 answer
  • I literally forgot! <br>What is chemistry?​
    8·2 answers
  • Consider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
    12·1 answer
  • 7. Which word BEST describes symbiosis?
    12·1 answer
  • This graph compares the amounts of three different substances that can dissolve in 100 g of water at temperatures between 0° C a
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!