Atoms
What are the 3 subatomic particles in an atom and what are their charges?
Protons: +
Neutrons: 0
Electrons: -
The Periodic Table contains all known ____. There are _____ total.
Elements
118
Define Matter.
Anything that has mass and takes up space.
Equal
What makes up all of the matter around us?
Atoms
What are the 2 parts of an atom?
Nucleus and Electron Cloud
Who created the Periodic Table?
Dimitri Mendeleev
What is an element? Give an example.
a pure substance that cannot be broken down into simpler substances (H, He, Ne, Fe, Ag, etc)
What is on the left side of an equation? What is on the right side of an equation?
Reactants
Products
What is the difference between the atomic # and atomic mass for an element?
Atomic Mass= # protons + # neutrons
Atomic Number tells you the number of protons and electrons
Where are Protons, Neutrons, and Electrons located in an atom?
Protons and Neutrons located in the nucleus
Electrons located in the electron cloud
How is the Periodic Table organized?
By groups (columns) and periods (rows)
What is a compound? Give an example.
2 or more elements chemically combined (H2O, CO2, C6H12O6, etc)
What is the coefficient in a chemical equation? What is the subscript?
Coefficient: big # to the left of the symbol
Subscript: little # to the right of the symbol
What are electrons in the outer shell called? How are they found by looking at the Periodic Table?
Valence electrons, look at the group #
The _____ makes up most of the weight in an atom. The _____ makes up most of the space in an atom.
Nucleus
Electron Cloud
The period # tells you the # of _____.
Valence Electrons
Shells
What is the difference between the two types of mixtures? Give an example of each.
Homogeneous- same (lemonade, sweet tea, water, iron, gas, air, etc)
Heterogeneous- different (trail mix, water and oil mixture, pizza, etc)
What is the Golden Rule of solving chemical equations?
Always change the coefficient, never change the subscript
List the following for Boron:
Atomic #:
Atomic Mass:
Symbol:
# of protons:
# of neutrons:
# of electrons:
Atomic #: 5
Atomic Mass: 10.81 (rounds to 11)
Symbol: B
# of protons: 5
# of neutrons: 6
# of electrons: 5
Draw the Bohr model for Aluminum.
3 shells with 13 electrons (2 on first shell, 8 on second shell, and 3 on third shell)
What do the colors on the periodic table tell you? What does that tell you about an atom?
Families, which tell you the properties of that element
What does the Law of Conservation of Matter state? Give an example of it being used.
Matter cannot be created or destroyed, only transferred
Is the following equation balanced? Balance it, if not.
It is not balanced.
Draw the Bohr model for Phosphorus and list the following:
# of neutrons-
# of protons-
# of electrons-
# of neutrons- 16
# of protons- 15
# of electrons- 15