Nuclear Chemistry Flashcards
1
Q
List the charges of protons, neutrons and electrons
A
Protons= positive
Neutrons= neutral
Electrons= negative
2
Q
What is the atomic number?
A
Number of protons (determines the element)
3
Q
What is the mass number?
A
protons+neutrons
4
Q
Number of neutrons=
A
atomic mass-atomic number
5
Q
Most elements exist as ______
A
isotopes
6
Q
What are isotopes?
A
Atoms with same number of protons but different number of neutrons
7
Q
What is relative mass?
A
Mass according to the relative abundance of each element and their isotopes
8
Q
What is the nucleus held together by? Why?
A
Strong nuclear force
Necessary to overcome the electrostatic repulsion between positive protons
9
Q
Unstable isotopes are called__
A
radioisotopes
