Elements
What is an element?
can NOT be broken down by chemical mean into a simpler substance.
What is a compound?
Two or more pure substances chemically bonded
What is a mixture?
Two or more substance PHYSICALLY combined
Kool-aid
Homogeneous Mixture
Is Ca a compound or an element?
Element- one
What is the symbol for the element calcium?
Ca
Do compounds have the same properties that the elements that make them up have?
new properties
specific ratios
separated chemically
Oil is soluble in water. True or false?
false
Jello
Homogeneous- colloid
Is NaCl a compound or an element?
Compound Na Cl Two
What charge does proton, neutron, and electrons have?
proton- positive
neutron- neutral
electrons-negative
Compounds need to be in a specific ratio. T/F
True:
H2O 2H : 1O
What is a solution?
substance that dissolves in another
pepper and water
Heterogeneous
How many atoms does H2O2 have?
Compound Four H2 O2
How is the periodic table arranged?
Rows- called periods
columns- called families
Name two compounds
H2O
NaCl
Lemonade is made of water, sugar, lemons. Identify the solutes and the solvent
solute-solid- sugar
solvent-liquid- water, lemon juice
Spagetti and meatballs, sand, salad
Heterogeneous
Is Zn a compound or an element?
element Zn One
List the characteristics/properties of metals, nonmetals and metalloids
metals: luster, ductile, mallaeable, conductor
non-metals: no luster, poor conductor, brittle
metalloids: luster, brittle, good conductors
Write a chemical formula for caffeine that's made up of 8 atoms of carbon, 10 atoms of hydrogen, 4 atoms of nitrogen and 2 atoms of oxygen
Give a definition for: solution, suspension, colloid
suspension- solutes settle out- sand water
colloid- solute suspended throughout- jello
air, steel, tea
homogeneous
How many atoms does C6H12O6 have?
compound 12 C6 H12 O6