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Maggie Warren :D

Chemistry Study Guide Chapter 3/21

QuestionAnswer
Gamma rays are? Electromagnetic waves
As the mass number of isotopes of an element increases, the nuber of preotons? Remains the same
An atom of potassium has 19 protons and 20 neutrons. What is its mass number? 39
What are often used to monitor the approximate radiation exposure of people working with radioactive materials? Film Badges
The forces that hold the particles in the nucleus together are called? Nuclear forces
The discovery of the electron resulted from expirements using? Cathode rays
Which instrument detect radiation by counting electric pluses carried by ionized gas atoms? Geiger-Muller counters
All atoms of the same element have the same? Atomic number
How many significant digits are in 50.00000? 7
In a glass tube, electrical current passes from the negative electrode, called the _______ to the other electrode. Cathode
Created by: maggie warren