1.3 - The arrangement of electrons in atoms Flashcards
In an atom, what is each electron in?
An energy level
What can energy levels be represented as?
Shells
What can the lowest energy level of an atom (first shell) hold?
2 electrons
What can the second energy level of an atom hold?
8 electrons
What is the pattern for how many electrons energy levels can hold?
2,8,8…
What energy level do electrons occupy?
The lowest possible
What do elements in the same group have in common?
The same number of electrons in the highest energy level
How many electrons do group 1 elements have in their highest energy level?
1
How do group 1 elements react with water and oxygen?
They react quickly
What makes group 0 elements so unreactive?
They have very stable arrangements of electrons (all their energy levels are full?
What are the group 0 elements?q
The noble gases
