Atomic Structure Flashcards
(19 cards)
What is relative atomic mass?
average mass number of all isotopes
Relative charge of an electron
-1
Relative charge of a proton
+1
Relative charge of a neutron
0
Relative mass of a proton
1
Relative mass of an electron
0.0005
Relative mass of a neutron
1
What does an elements period show?
number of shells
What does an elements group show?
number of electrons in its outer shell
Definition of an isotope
atoms with same atomic number but different mass numbers
Top number next to element on periodic table
mass number
Bottom number next to element on periodic table
atomic number
What does the mass number show?
number of protons + neutrons
What does the atomic number show?
number of protons/electrons
What is a subatomic particle?
Particles found within an atom
Where are electrons found?
Shells around nucleus
Where are protons found?
In nucleus
Where are neutrons found?
In nucleus
What are noble gases?
All have full outer shell of electrons, so they are not very reactive (inert)
