Periodic Table
Atomic Structure
Compounds
Reactions
Change
100
Oxygen (# of protons)
What is 8?
100
A = P = E
What is "atomic # = protons = electrons"?
100
This is formed when two are more different elements are chemically bonded with one another
What is a compound?
100
In a chemical equation, the "yields" arrow always points to this
What are "products"?
100
Food is crushed by teeth
What is physical change?
200
Sulfur belongs to this group (metal, nonmetal, metalloid)
What is a nonmetal?
200
M - A = N
What is "mass - atomic # = neutrons"?
200
this compound has two hydrogen atoms and 1 oxygen atom
What is H (subscript) 2 O?
200
elements and compounds found to the left of the "yields" arrow
What are reactants?
200
Metal has rusted
What is chemical change?
300
Where elements that are most similar can be found
What is in a Group (vertical column)?
300
Subatomic particles found in an atom's nucleus
What are protons and neutrons?
300
a coefficient of 2 in front of a water molecule would mean you have this many Hydrogen and this many Oxygen atoms
What are 4 H (hydrogen) atoms and 2 O (oxygen) atoms?
300
sign of chemical reaction if bubbles form when substances are combined
What is "a gas is formed"?
300
Two liquids are combined and a solid is formed
What is chemical change:
400
Made up of atoms of the same kind
What is an element?
400
Negative subatomic particles that orbit the nucleus in a cloud
What are electrons?
400
in the equation 2 H (subscript)2 + O (subscript) 2 yields 2 H (subscript) 2 O (subscript) 2 there this many compounds and this many elements
What is one compound (2 H subscript 2 O) and two elements (2 H subscript 2 and O subscript 2)?
400
sign of chemical reaction if a solid forms when two liquids are combined
What is a precipitate?
400
Food is broken down by stomach acids
What is chemical change?
500
Silicon is a member of this category (metal, nonmetal, metalloid)
What is a metalloid?
500
Electrons found in the outermost energy level of an atom
What are valence electrons?
500
Organic compounds must contain these 3 elements
What are carbon, hydrogen, and oxygen (C, H, O)?
500
sign that a chemical reaction has occurred when energy is released or absorbed
What is "a change in temperature"?
500
A solid is dissolved in a liquid
What is physical change?
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