« previous next »

Author Question: The atomic nucleus contains A) yogurt. B) protons only. C) neutrons and electrons. D) ... (Read 55 times)

erika

  • Hero Member
  • *****
  • Posts: 522
on: Jul 29, 2018
The atomic nucleus contains
 
  A) yogurt.
  B) protons only.
  C) neutrons and electrons.
  D) protons and neutrons.
  E) protons and electrons.

Question 2

At Chernobyl, one of the harmful radioactive isotopes was 131I, a beta emitter with a halflife of 8 days. The mass number of the nucleus that remains after this isotope decays is
 
  A) 132. B) 129. C) 131. D) 127. E) 130.


mjenn52

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

The Nucleus Is Enclosed by a Double Membrane The Nucleus Is Enclosed by a Double Membrane
(A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph (A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph
The nucleolus (arrow) is a prominent structure in the nucleus The nucleolus (arrow) is a prominent structure in the nucleus
How far apart should two protons be if the electrical force of repulsion exerted on each one is ... How far apart should two protons be if the electrical force of repulsion exerted on each one is ...
What is the isotopic atomic mass of an isotope if 9.7023 1022 atoms weighs 4.0256 g? What is the isotopic atomic mass of an isotope if 9.7023 1022 atoms weighs 4.0256 g?
Meiosis I One diploid nucleus to two haploid nuclei Meiosis I One diploid nucleus to two haploid nuclei
Video: Otitis Media

For a complete list of videos, visit our video library