Atomic Structure Flashcards
Atoms contain three sub atomic particles called?
Protons, neutrons and electrons
Where are the protons and neutrons found?
In the nucleus - centre of the atom
Electrons are..
Arranged in shells around the nucleus
Number of electrons = number of protons.. Atoms are
Electrically neutral overall
What is the number of protons in the nucleus called?
Atomic (proton) number
The total number of protons and neutrons in an atom is called
Mass number
Mass number - protons
= neutrons
Innermost shelled is fill first Maxim number of electrons is
2
The second has a maxim number of electrons which is..
8
Third has a maximum of
8
What is a electronic configuration?
A description of how the electrons are arranged
The vertical columns in the periodic table are called
Groups
The number of electrons in the outer shell of all the element in a group is the same
As the group number
All the group 1 elements have
One electron in the outer shell
The period number is the same as the number of
Occupied electron shells
