This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following is a radioactive semimetal? A) Ge B) Pm C) Po D) Rn E) none of the ... (Read 42 times)

kamilo84

  • Sr. Member
  • ****
  • Posts: 495
on: Aug 27, 2018
Which of the following is a radioactive semimetal?
 
  A) Ge
  B) Pm
  C) Po
  D) Rn
  E) none of the above

Question 2

What is the term for a modification of a substance that alters its chemical composition?
 
  A) atomic change
  B) chemical change
  C) molecular change
  D) physical change
  E) none of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Aug 27, 2018
Answer to Question 1

C

Answer to Question 2

B)


kamilo84

  • Sr. Member
  • ****
  • Posts: 495
Reply #2 on: Aug 27, 2018
Both answers were spot on, thank you once again


juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Aug 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Isotopes may be stable or radioactive depending on the arrangement and number of neutrons in the nuc Isotopes may be stable or radioactive depending on the arrangement and number of neutrons in the nuc
(a) Uranium series dating uses the decay chain of radioactive uranium to stable lead. (a) Uranium series dating uses the decay chain of radioactive uranium to stable lead.
The inverse-square law and its effects. Doubling your distance away from a radioactive material ... The inverse-square law and its effects. Doubling your distance away from a radioactive material ...
Radioactive waste Radioactive waste
The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is ... The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is ...
In situ hybridization between a radioactive probe In situ hybridization between a radioactive probe
Video: Stroke volume - preload, sarcomere length and Frank -Starling law

For a complete list of videos, visit our video library