Atomic Stucture Flashcards
1
Q
Definition of an atom
A
The smallest particle of a chemical element that can exist.
2
Q
Definition if a a molecule
A
Group of atoms bonded together that can take part in a chemical reaction
3
Q
Relative charge and mass of particles
A
Proton= +1 y 1 Neutron= 0 y 1 Electron= -1 y 1/1839
4
Q
Atomic number definition
A
Number of protons in nucleus
5
Q
Mass number
A
Sum of number of protons and neutrons
6
Q
Isotopes definition
A
Some elements that contain same atomic numbers but different mass number.
7
Q
Relative atomic mass for isotopes
A
(% of isotope 1 * mass of isotope 1) + (%of isotope 2 * mass of isotope 2)= answer divided by 100
