* *
* *
**

neopages network:homeinfoforumscontact
learnchem.net

*
*
navigation:
*
 home *
*
news
about us
contact us
search site
*
 tutorials *
*
index
submit tutorial
request tutorial
*
 organic chemistry *
*
index
important tables
reactions
*
 practice tests *
*
index
submit practice tests
request practice tests
*
 online quizzes *
*
index
chemistry olympiad test questions
submit quizzes
request quizzes
*
 reference tools *
*
constants
formulas
glossary
periodic table
si units/conversions
thermodynamic data
*

1. You are given a substance, X. The weight is 8.227 grams. The half-life of substance X is 16.5 hours. How much did X weight 5 days ago?
635 grams 1270 grams 1720 grams 860 grams None of these

2. The reaction: 14/7 C --> 0/-1 e + 14/7 N is an example of a (blank) emission.
Alpha particle emission Beta particle emission electron capture positron emission None of these

3. When 237/93 Np produces an alpha particle, what is the other product?
243/95 Americium 245/95 Americium 237/91 Protactinium 233/91 Protactinium None of these

4. Fill in the blank: 22/11 Na--> (blank) +22/10 Ne
4/2 He 1/0 n 0/-1 e 0/1 e None of these

5. If exactly one neutron from each fission event in a fission reaction causes another fission event, the process is said to be (blank).
Critical Sub-Critical Large Fissionable Event None of these

Name:
E-mail:


Last 15 Challengers
*

news | about us | contact us
tutorials index | organic chemistry | practice tests | online quizzes | reference tools
site copyright (c) 2002 to neopages.com

*
*
newsletter:
newsletter
*
*
*
neopages network:
*
network news:
*