7.1

• Scheikunde
• Middelbare school
• havo
• Leerjaar 3

Metals

# formula consists only of symbol of metal-atoms

# metallic lattice

# positively charged "metal-ions" and freely moving elektrons

# metal bond

# conduct electricity in solid and liquid phase

Molecular substances (7.3)

# molecules in a molecular lattice

# only symbols of non-metals in the formula

# atomic or covalent bond within molecules

# Van der Waals bonding between molecules

# Hydrogen bond (between, OH- and or NH-groups!)

# No charged particles which can move freely => cannot conduct electricity in any phase!

Salts

# formula consists of symbols of non-metals and metals

# Ionic lattice

#ionic bond

# Negatively charged non-metal ions and 

positively charged metal ions.

# Conduct electricity in liquid and dissolved (aq) phase. (in solid phase the charged particles cannot move!)

NaCl is a

1. metal
2. salt
3. moleculair substance

CO2 is a

1. metal
2. salt
3. moleculair substance

Pb is a

1. metal
2. salt
3. moleculair substance

H2SO4 is a

1. metal
2. salt
3. moleculair substance

Si is a

1. metal
2. salt
3. moleculair substance

K2CO3 is a

1. metal
2. salt
3. moleculair substance