Vocabulary
Difference between an insulator and conductor
Conductors are material where electrons can easily flow through whereas in an insulator the electrons can not flow through easily
Explain the different parts of the atom.
Nucleus- center of the atom containing the protons and neutrons
Proton- postive charge sub particles
Neutrons- no charge
Electron cloud contains the electrons
Electrons- negativly charged
explain the 3 different states of matter at a molecular level
Solids- molecules are very slow moving and closely compacted
liquids- more at a medium speed and losely packed together
gases- are fast moving and spread apart
What is group 1 on period table called
Alkali metals
when do you know an element is stable
when the element has a full outer shell or 8 valence electrons
What is ohm's law
Voltage/ resistance=current
Voltage= Current X resistance
V=IR
what is an example of a conductor
any metal
PiVi=PfVf
P1V1=P2V2
Te
example of covalent bonds
any two nonmetals.
Water, CO2
difference between a parallel circuit and a series circuit
Parallel is a circuit that has more than one path to follow whereas a series circuit only has one path for the current to follow
List 3 examples of an insulator
nonmetals such as plastic wood or rubber
why does a steel boat float but not a steel block?
Buoyancy.
As well as the boat is more hollow and the block is solid have a higher density than the boat
Boron B is apart of what group
metalloids
any metal and nonmetal combination
NaCl
difference between homogenous mixture and heterogenous mixture
heterogenous mixture is a substance in which the different parts are easily distingushed whereas homogenous mixture they are uniformed
How do you make an electromagnet stronger
Add extra coils. the more coils in the wire the stronger the electromagnet
examples of physical properties
color
order
density
state of matter
melting point
boiling point
The periodic table is mostly made of what
Metals
What is the name of CaBr₂
Calcium dibromide or calcuim bromide
difference between physical change and chemical change.
Chemical change is a change of one substance into a new substance. physical change is the change in size shape or state of matter where the identitiy remains the same
How does a compass work
The north side of the compass needle is attracted to the Earth's south magnetic pole.
Example of a heterogenous and homogenous mixture
Homogenous: coffee, tea, saltwater, juice
heterogenous, salad, trail mix
How many dots or Valence electrons would Al have
balance the equation _C3H8+_O2------>___ CO2+_ H2O
_C3H8+_5O2------>__3 CO2+_4 H2O