How do the shapes and volumes compare between solids, liquids, and gases?
Soilds have a definte shape and volume luqids have a definte volume and gases have no definte anything
Explain the difference in flow rate between high and low viscosity.
Things with high viscosity flow slower since there are more particles
Explain the difference between a chemical and a physical property of a substance
Chemical properties are properties that allow it to change into a new substance -Flammability
Physical properties are properties that change without making a new substance -Color, Shape, Thermal Conductivity, Ductility, Solubility
Describe an endothermic and exothermic reaction
An edothermic reaction is one that takes energy in
An exothermic reaction is one where energy is taken out
How do the energy levels differ from start to finish in each.
Endothermic have less energy in the beginning and gain through the end
Exothermic reactions have more energy at the beginning than at the end
Give three examples of matter.
shoe apple lamp
Describe the structure of an atom- be sure to include the following:
An atoms is round and has a nucleus in the middle there are protons and neturons the neutrons buffer out the protons so they do not explode on the other orbitals there are electrons which are reasponsible for bonding
What are the three components of an atom
Neutrons Protons Electrons
What is the charge each component has
Neutrons (no charge) Protons (+) Electrons (-)
where is each component located within the atom
Protons (nucleus) Neutrons (nucleus) Electrons (outer)
What distinguishes an atom of one element from an atom of another element
The amount of protons determines the atoms
Which groups are most likely to give away electrons in bonding
the groups with low amounts of electrons
Which group is unreactive and why
Group 8, this is because there are already 8 electrons on the outer orbital
What is the mass of protons, neutrons, and electrons
Proton= 1amu Neutron= 1amu Electron= to small
Be able to determine the number of neutrons in an isotope when given the atomic mass of an isotope
You take the orginal number or protons and subtract the number of neutrons to it
Be able to determine the number of electrons in an ion of a given charge.
You look at the periodic table and compare, an ion is an atom that does have a charge
What is a chemical formula? Describe how you can tell how many atoms of each element are present.
A chemical formula is the formula that describes the make up of a molecule
Describe a covalent bond and list properties of a covalent bond
Covalent bonding is when two atoms share electrons, normally non metals, lots of energy, they make molecules,
Describe an ionic bond and list properties of an ionic bond
An ionic bond is a chemical bond that either gains or losses electrons in an atoms
Which groups on the periodic table are most likely to bond ionically
Groups with higher and lower group numbers
Describe where valence electrons can be found in an atom
The valence electrons are found in the outer orbital the number can be determined by looking at the group number on the periodic table
How many electrons are in the inner most orbital of an atom? What is the maximum number of valence electrons that can be present in an atom?
there is two in the inside and at the most 8 on the outside
List the metric unit used to denote mass, liquid volume, and length.
Mass- Gram Volume Litters Length Meters Liquid- Liter (L)