Types of Matter
A substance made of only one kind of atom (e.g., Gold)
What is an Element?
Change in size, shape, or state (e.g., Melting Ice)
What is a Physical Change?
A vertical column on the periodic table.
What is a group/family?)
This family of elements in Group 1 is very reactive and includes sodium and potassium.
What is alkali metals?
A compound made of a metal and a non-metal.
What is an ionic compound?
Two or more substances physically mixed, not chemically bonded (e.g., Saltwater)
What is a Mixture?
Forms a new substance (e.g., Baking a Cake)
What is a Chemical Change?
The horizontal rows on the periodic table are called this
What is a Periods?
These elements in Group 2 are reactive metals, but less so than Group 1.
What are alkaline earth metals?
A compound made of two non-metals.
What is a molecular (covalent) compound?
Pure substance with fixed ratios
What is a Compound?
Tearing paper is this type of change.
What is Physical?
Has the atomic number of 16.
What is sulfur?
The elements in the far-right column known for being unreactive.
What are noble gases?
The formula for pentasulfur dioxide.
What is S5O2?
A homogeneous mixture, like Kool-Aid
What is a Solution?
Rusting iron is this type of change.
What is Chemical?
Has the atomic mass of 52.00.
What is chromium?
These elements are found in the middle section of the periodic table, in Groups 3–12.
What are transition metals?
This part of a chemical formula tells you how many atoms of an element are present.
What is a subscript?
Saltwater is an example of this type of mixture.
What is a solution?
Boiling water is this, even though it changes state
What is Physical?
These are the three subatomic particles
What are protons, neutrons, and electrons?
This family includes elements like fluorine, chlorine, and bromine. They are highly reactive non-metals in Group 17.
What are halogens?
The ionic compound formed from magnesium and chlorine.
What is MgCl₂?