Structure of elements Flashcards
1
Q
What is the atomic number?
A
The atomic number is the number of protons in the nucleus of an atom. It decides the chemical properties.
2
Q
What is the Atomic mass?
A
The atomic mass is the average mass of the atoms in an element. It decides the physical properties.
3
Q
How can we calculate the mass number?
A
protons + neutrons
4
Q
How can we calculate the atomic number?
A
Proton number
5
Q
What does the proton number equal?
A
Electrons number
