About Us  |  Links

1. Which of these is not an element?
Uranium Plutonium Iron Gold Brass

2. Which of these has a positive charge?
Protons Neutrons Electrons Quarks None of these

3. How many protons in sodium-23?
11 12 23 1 0

4. When an element has a different number of neutrons, it is called a/an...
Anomaly Differentiated Mutated Isotope None of these

5. Which of these is a pure substance?
Blood Ocean Brass Wine Table Salt (NaCl)

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

privacy policy