Name 5 properties that a specific material can be identified by
freezing point, density, atomic mass, condensation point, boiling point, melting point
Name the 7 diatomic elements, what does diatomic mean?
H2, I2, N2, Cl2, Br2, O2, F2 ; 2 atoms
List the 5 properties of metals, where are they located on the Periodic Table? Where is the most reactive metal located?
luster, malleable, ductile, most solids at room temp., conductors of heat & electricity, 3 or fewer valence electrons, to the left, all the way to the left Francium
List the 5 properties of nonmetals, where are they located on the Periodic Table? where is the most reactive metal located?
little to no luster, non-malleable, non-ductile, most gases at room temp., poor conductors of heat & electricity, 5 or more valence electrons, to the right, all the way to the right ;Fluorine
Name and describe the 2 main classifications matter
heterogeneous-different parts, different properties homogeneous-all properties are the same
Name any 2 materials that can be classified as substances & give 2 ways that they are different from each other
element- can't be broken down by heat vs chemical mean compound-can be broken down by heat
A combo nation of sugar & water would be classified as:
What are the 2 types of energy transfer that can occur between a system & its surroundings?
Endothermic-heat goes in, requires heat to occur Exothermic- heat goes out, reaction produces heat (burning of coal)
What is a physical property? Give 5 ex.
characteristics that can be observed without altering the identity of a substance ( color,length, size, volume, mass)
What is a chemical property? Give 5 ex.
characteristics of a substance that can't be observed without altering the make-up of the substance (does it burn, is it toxic, does it react with water, is it acidic, does it rust)
What is a physical change? Give 5 ex.
changes that don't alter the chemical make-up of a substance, generally easy to reverse (chopping, tearing, crushing, mixing, pouring)
What is a chemical change? Give 5 ex.
changes that alters identity (burning, milk souring, aging, growing, rusting)
What are 4 good indications that chemical change has occurred?
gas given off, bubbles, change in temp., precipitation occurs
What are the 3 phases of matter? describe each in their shape, kinetic energy, & spacing of molecules.
gas- molecules far apart, high kinetic energy liquid- loose molecules, medium kinetic energy solid-molecules close together, low kinetic energy
Elements are represented by
Compounds are represented by:
Which subatomic particle is involved in a chemical reaction?
When metals react they _______ electrons forming ____ ions called _________.
lose, positive, cation
When nonmetals react they ____ electrons forming ____ ions called _____.
gain, negative, anion
Atoms react to become _____ like the ________ which are in Group I8. This Group has a full outer shell called an ___________. Since they are stable and don't want to react their oxidation number is ___.
stable, noble gases, octet, 0
What is the characteristic ion present in water solutions of all acids?
What is the characteristic ion present in water solutions of all bases?
What are the 5 main reactions types & how do you recognize each type?