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Foundations of Chemistry
States of Matter
Understanding the Atom
The Periodic Table
Elements and Chemical Bonds
100
The number of these always differs in atoms of different elements.
What are protons
100
state of matter that is rarely found on Earth
What is plasma
100
an atom is mostly made of this
What is empty space
100
ability of a metal to reflect light
What is luster
100
force that holds two or more atoms together
What is a chemical bond
200
An objects density is the amount of what per a certain unit of volume
What is mass
200
opposite of condensation
What is vaporization
200
atoms of the same element that have different numbers of neutrons
What is isotopes
200
the ability to be pulled into thin wires
What is ductility
200
outermost electron of an atom that participates in chemical bonding
What is a valence electron
300
the transfer of thermal energy between materials by the collisions of particles
What is conduction
300
held constant when a gas obeys Boyle's law
What is temperature
300
area around an atomic nucleus where an electron is most likely to be located
What is an electron cloud
300
ability of a substance to be hammered or rolled into sheets
What is malleability
300
model that represents valence electrons in an atom as dots around the element's chemical symbol
What is a electron dot diagram
400
property of matter that changes during a chemical change but does NOT change during a physical change
What is identity
400
material that particles would be most closely spaced
What is solid
400
process that occurs when an unstable atomic nucleus by emitting radiation
What is nuclear decay
400
helium, neon, argon, krypton, xenon, and radon
What are noble gases
400
a molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons
What is a polar molecule
500
type of mixture in which the individual substances are not evenly mixed
What is heterogeneous
500
amount of force applied per unit of area
What is pressure
500
an atom that is no longer neutral because it has gained or lost electrons
What is an ion
500
element that has physical and chemical properties of both metals and nonmetals
What is a metalloid
500
a chemical bond formed when two atoms share one or more pairs of valence electrons
What is a covalent bond