The atom (size and mass) Flashcards
(8 cards)
1
Q
What is the radius of an atom?
A
0.1 nm
2
Q
What is the radius of the nucleus?
A
About 1/10000 of the atom
3
Q
What is relative atomic mass?
A
The average value that takes into account the abundance of the isotopes of the element.
4
Q
Which electrons occupy the lowest energy levels?
A
The innermost available shells
5
Q
What is the mass number?
A
The number of protons plus the number of neutrons
6
Q
What is the atomic number?
A
Number of protons
7
Q
What is the relative mass for the subatomic particles?
A
Protons 1 amu
Neutrons 1 amu
Electrons 0 amu
8
Q
What are the relative charges of the subatomic particles?
A
Protons +1
Neutrons 0
Electrons -1
