Chemistry test

What is the charge carried by a beta particle?

\-1

What divides in fission?

Neutrons

fission is ?

man made

Bombard, capture, or absorb means

the particle is on the left side

neutrons ______ in fission

divide

The isotope Bi-214 decays from 60.00 g to 7.50 g in 1 hour.  What is the amount of time for one half-life?

20 min

What percent of the original sample remains after 4 hours?

40%

Radioactive C-14 has a half-life of about 5,000 years.  If a fossil is only about 25% as radioactive (compared to the original) as expected for living tissue of the same mass, the age of the fossil is about:

10,000 years

In fission reactions, which particle is responsible for the continuation of the chain reaction?

neutrons

Doctors use the radioactive isotope chromium-51 to label red blood cells in the human body. Chromium-51 gives off relatively ______ alpha particles that can be stopped by _______ .

(A) energetic; lead

(B) weak; a thin sheet of copper

(C) energetic; a thick sheet of copper.

(D) weak; a sheet of paper

D

The three types of nuclear radiation in increasing order of penetrating power are _______.  

alpha, beta. gamma

Which of the following statements about nuclear fission is correct?

nuclear fission is an energetically favorable process for heavy atoms

What causes this nuclear reaction to occur?

addition of neutron

A group of students proposed four different models to show the fusion of hydrogen to form helium. which model shows the process of nuclear fusion.

B

Fusion is?

Natural

what do you need for fusion

Hydrogen

What isotopes of hydrogen are used for man-made fusion

Deuterium and Tritium

Problem with fusion

costs alot of money and we are using more energy to create it then we are getting out of it

Fusion equation

2/1H + 3/1H → 4/2 He + 1/0n

during beta decay, where is the beta particle placed?

the right

What are the products of fission?

Barium-141 and Krypton-92

What are the products of fusioN?

Helium-4 and a neutron

Which reaction releases more energy

fusion

alpha decay

beta decay

fission

fusion