Independence University

CHE 101

Question1)The radiation detector that uses detection of flashes of light is a       .

Question 2

A(n)                        is a high-energy form of electromagnetic radiation commonly released during radioactive decay.

Question 3

Which type of radiation is most penetrating?

Question 4

Which of the following isotope is the most commonly used for dating objects?

Question 5

Complete the following equation by adding the missing species:

27 13 Al + 4 2 He ---> ? + 1 0 n

Question 6

The greatest source of radiation most humans are exposed to is                      

cosmic rays medical x-rays

Question 7

A(n)           is a device in which a nuclear reaction is used to generate energy.

Question 8

The isotope 208Tl undergoes β decay with a half-life of 3.1 min. How long will it take for 99.0% of a sample of pure 208Tl to decay?

Question 9

The isotope 208Tl undergoes β decay with a half-life of 3.1 min. What percentage of a sample of pure 208Tl remains un-decayed after 1.0 h?

Question 10

How many moles are in 100.56g HCl? 1800mol

Question 11

How many atoms are in 5 g of copper?

Question 12

The empirical formula of C9 H12 is                        

Question 13

If a molecule has 12 carbons, 6 hydrogens, and 12 oxygens, what is its empirical formula?

Question 14