The Periodic Table
The horizontal rows on the periodic table
What are periods?
What are products?
These can include boiling point, odor, color, and luster
What are physical properties?
When there is only one type of atom present
What is a pure element?
There are 118 of these found on the periodic table
What are elements?
The most stable family of elements on the periodic table
What are noble gases?
When 2 or more elements combine to make a more complex substance
What is synthesis?
The type of change that always forms a new substance
What is chemical change?
A pure substance containing two or more kinds of elements
What is a compound?
The component of an atom with a positive charge
What are protons?
The element in period 4 with 7 valence electrons
What is bromine?
When balancing an equation, these numbers cannot be changed
What are subscripts?
An example of this could be fruit rotting
What is a chemical property?
A uniform mixture that cannot be separated by physical means
What is homogeneous?
These are represented by the dots in a Lewis Dot structure
What are valence electrons?
The category of elements that are good conductors of electricity
What are metals?
When 1 element replaces another one in a compound during a chemical reaction
What is single replacement?
The type of change that can sometimes be undone
What is physical change?
An example of this could be a bowl of Lucky Charms
What is a heterogeneous mixture?
The type of bond between a metal element and a non-metal element
What is an ionic bond?
This is needed to calculate protons, neutrons, and electrons
What is the atomic number?
A type of chemical reaction that requires heat/energy to break bonds
What is an endothermic reaction?
A type of chemical change indicated by metal turning reddish-brown
What is rust?
A homogeneous mixture that includes liquid/water
What is a solution?
In a Bohr model, this shell has a maximum of 8 electrons
What is the second shell?