Chemistry Test 2 Grade 9 Flashcards
How many total electrons can go on each row in a bore diagram
2e
8e
8e
Many e
What are the outer most electrons called
Valence electrons
Where can e jump
Electrons can jump between these shells by gaining or losing e
Where are p and n found
In the nucleus
Where are e found
Found in energy levels from the nucleus
What are ionic charges and ions
Ionic charge is the electric charge an atom takes when it loses or gains e
An atom that has gained or lost e
If an atom loses e it becomes _____ and is called ____
If an atom gains e it becomes _____ and is called ____
Becomes positive and is called a cation
Becomes negative and is called an anion
Drawing a Bohr diagram
The protons and neutrons go at the bottom and the electrons go on the lines
How to do p e n
P is the atomic number smaller number
E is the atomic number smaller number
N is the atomic mass bigger number (subtract the atomic mass by the atomic number)
Review naming and formulas
Review Lewis dot diagrams and bonding them
Ionic compounds
Metal + non metal
High melting ands boiling points
MgCl2
Dissolves and conducts
NH4Cl
Tin (IV) oxide
molecular
2 or more non metals combine
electrons can be shared between atoms in a covelent bond
good insulators and poor conductors
low boiling and melting points
H2
dinitrogen pentabromide
