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27 Cards in this Set

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  • Back
Chemical Bond
A force that holds two or more atoms together.
molecule
A group of atoms held together by one type of chemical bond.
( A molecule is made up of two or more atoms.)
chemical symbol
Is one or two letters that stand for the name of an element.
formula
is a group of symbols that shows how many atoms of each element are in a molecule of a compound.
Two or more elements combined chemically to form a new substance.
Compound
Have properties of both metals and nonmetals.
semimetals
Number of protons in one atom of an element.
atomic number
Something made of only one kind of matter.
substance
One or two letters that stand for the name of an element.
chemical symbol
Elements that have no shine, cannot be shaped and are poor conductors of heat and electricity.
nonmetals
Substance that cannot be broken down by simple means into any other substance.
Element
Trait that can be observed and measured without changing the identity of a material.
Physical property
Group of symbols that shows how many atoms of each element are in a molecule of a compound.
formula
Anything that has mass and takes up space.
matter
Two or more atoms held together by one type of chemical bond.
molecule
Way to describe how something looks or acts or a way to think about something.
model
Gases that do not react readily with other elements.
noble gases
Describes how one substance reacts with another substance.
Chemical property
Elements that are shiny, have high densities, and are good conductors of heat and electricity.
metals
Matter that contains two or more substances that do not change their identities.
mixture
A force that holds two atoms together
chemical bond
Name two ways matter can be classified.
1. Substance
2. Mixture
What are building blocks of matter?
Elements
What are the largest group of elements?
metals
What gases used to be called inert gases?
noble gases
Three examples of physical properties
Luster
density
mass
How can elements be classified?
Elements can be clasified as physical or chemical properties.