The atom
The atom is made into what two parts?
Nucleus and electron cloud
How are the elements arranged in the periodic table?
increasing atomic number and mass
as well as characteristics/properties
What is the formula for water?
H2O
A pencil breaking in half.
Physical
Acid or Base? Vinegar
Acid
Name the subatomic particles (what makes up an atom)
Protons
Neutrons
Electrons
What does the group number tell you?
The number of valance electrons
Water has what type of bonding?
Covalent
What are the three states of matter?
solid, liquid, gas
Acid or a Base? Bleach
Base
How do you determine the number of protons?
Atomic number
If Sodium, Na, has an atomic number of 11 then how many protons does it have?
11
Due to its bonding, water is a polar molecule, which means....
That its oxygen end is slightly negative and the hydrogen end is slightly positive
When gasoline in an engine burns to create exhaust.
chemical
Acid or a Base? Water
Neither
It is neutral
How do you determine the number of neutrons?
Atomic mass - atomic number
If Nitrogen has an atomic number of 7 and an atomic mass of 14 then how many neutrons does it have?
7
What type of bonds form between water molecules to create surface tension?
Hydrogen bonds
The leaves of trees changing from green to orange in the Autumn.
Chemical
Acid or Base? Milk
acidic (slightly 6.5-6.8)
What makes up the atomic mass? (the weight of an atom)
Mostly protons and neutrons but a small amount from electrons
If Fluorine has an atomic number of 9, an atomic mass of 18.998 and is in group number 7. How many valence electrons does it have?
7
Name the properties of water that we discussed in class.
Cohesion
Adhesion
High Specific Heat
Universal solvent
Ice floats (solid water is less dense than liquid water)
What are three indicators that a chemical reaction has occurred?
color change
release of gas
temperature change
What is the range of a pH scale?
What numbers are for acids and what numbers are for bases?
1-6 Acids
8-14 Bases