Name___________________________ Hr
Study Guide
Bonding Test
Atom
Metallic bond
Electron-dot
diagram
Oxidation
number
Chemical
bonding
Ionization
Diatomic
element
Vocabulary
Valence
electron
Ionization
energy
Molecule
Ionic bond
Covalent bond
Electron
affinity
Network solid
Crystal lattice
Polyatomic ion
Know and understand these concepts:
Atoms
An atom with the same number of electrons as protons is a neutral atom
Atoms will gain, lose or share electrons to get a full outer energy level
The first energy level is full when it contains two electrons
All others are considered full when they contain 8 electrons
Energy levels may hold more than 8 electrons!
If an atom gains electrons it will become negatively charged
If an atom loses electrons it will become positively charged
Ions
Atoms with a different number of protons than electrons
Ions have a positive or negative charge
The number of electrons gained or lost is called the atom’s oxidation number
Ionic Bonds
Occur between metals and nonmetals
One atom gains electrons while the other loses
Create crystal lattice
Strong bonds
Covalent Bonds
Occur whenever Hydrogen is involved
Occur between two nonmetals
Create molecules
Weak bonds
A very large covalently bonded molecule that has a strong bond is called a
network solid
Chemistry Unit/Bonding Chapter 1
Name___________________________ Hr
Metallic Bonds
Metallic bonds form between two metals
The nuclei of the atoms are surrounded by one common electron cloud
The force of attraction between nuclei and electrons are strong
This bond results in substances that are malleable and ductile
Predicting types of bonds:
What type of bond will occur between these atoms?
Na
Cl
C, H, O
Mg
Br
N H
If the rule is like dissolves like, will salt dissolve in a solvent made from cooking oil that
contains C, H, and O? Why or why not?
Why is water called the universal solvent?
You should be able to correctly draw the type of bonds that hold these molecules or
crystal lattices together.
Br2
CaF2
NaCl
NH3
Find the resulting formulas for reactions between these elements. Use the criss-cross
method!
Mg, Cl
Chemistry Unit/Bonding Chapter 1
Cr, Cl
Fe, O
Mg, O