Physical Changes
Change in apperance
What are physical changes?
Can only be observed as the substance changes into a different substance
Good conductors of heat and electricity
What are properties of metals?
Tightly packed but far enough to slide off each other
What are liquids?
Not distributed equally, Can see all the different parts
What is a heterogeneous mixture?
Metals that can be drawn out into wires
What is ductility?
Burns in presence of oxygen
What is flammability?
Have properties of metals and non-metals
What are metalloids?
Affected by magnetic fields
What are Plasmas?
Distributed equally, Can't see the different parts
What is a homogeneous mixture?
Metals that can be shaped without breaking
What is malleability?
Changes that result in another substance
What are chemical changes?
The outermost energy level of an atom
What are valence electrons?
Tightly packed with fixed position
What are solids?
Two or more pure substances joined by chemical bonds
What are compounds?
Property of metals that allow electric current to pass through them
What is conductivity?
How easily a substance can combine with another substance
What is reactivity?
Have 1 valence electron in the outermost level
What are Alkali metals?
Far apart and move freely
What are Gases?
Has definite chemical and physical properties
What are pure substances?
Allows a substance to be dissolved
What is solubility?
Protons and neutrons in the nucleus
What is the Atomic Weight?
On his/her own
What is Hydrogen?
The number of protons and electrons
What is the Atomic Number?
Pure substances that cannot be separated into simpler substance by physical or chemical means
What are elements?