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43 Cards in this Set

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A ----- of a substance indicates how it reacts with other substances.
chemical property
What makes up matter?
Elements are the basic building blocks of matter.
The particle of an atom that has no charge is a ----------.
neutron
proton
particle in an atom that has a positive electrical charge
A substance that forms when two or more different kinds of atoms combine is a ------.
compound
atom
the smallest particle of an element that has the properties of the element
When two or more atoms that are alike or different combine, they can form a ---------.
molecule
element
a substance that cannot be broken down into other substances by heat, light , or electricity
The smallest particle of an element is an ---------.
atom
electron
particle in an atom that has a negative electrical charge
Most of the mass of an atom is in the----------
nucleus
nucleus
the center of an atom, where protons and neutrons are located
How are burning and rusting similar?
Both are chemical changes; both are ways in which substance combine with oxygen
periodic table
a chart that classifies elements by their properties
describe a chemical property of iron.
The atoms of iron can combine with oxygen to form iron oxide, a form of rust
How are elements classified?
The periodic table classifies elements by their atomic structure(number of protons) and their properites.
you can use your senses to observe a __________of a substance.
physical property
What are atoms?
Atoms are tiny particles of matter, made up of protons, neutorns, and electrons.
chemical property
describes the way a substance reacts with other substances
compound
a substance made up of atoms of more than one element joined together in a molecule
Sand and iron filing together can make up a ______.
mixture
molecule
two or more atoms joined together; the smallest unit of many substances
A change that produces new substance with new properties is called a ---------
chemical change
How are compounds different from elements?
An element is made from only one kind of atom; a compound is formed from atoms of two or more elements.
Describe three examples of a chemical change.
wood joined with oxygen when it burns; rust forms when iron and oxygen join; food digesting
How is a compound similar to a compound word?
A compound is formed when the atoms of two or more different elements combine; a compound word is formed when two or more words combine.
physical property
a way of describing an object using traits that can be observed or measured without changing the substance into something else
How does a compound differ from a molecule?
A compound is formed from different atoms . A molecule can be formed from the same or different atoms.
An -------is made up of only one kind of atom.
element
mixture
two or more substance that are mixed together, but can be separated out because their atoms are not combined
Is a single oxygen atom a molecule?
No. A molecule contains two or more atoms.
An------is a particle in an atom that has a negative charge.
electron
What is a water molecule made of?
Two hydrogen atoms and an oxygen atom joined together
solution
a mixture in which substances break into their most basic particles, which are too small to be seen, and spread evenly through another substance
In a ------, the parts are spread out evenly.
solution
Elements are classified in the---------.
periodic table
physical change
a change in one or more physical properties
Can a compound be easily separated into its parts?
No. In a compound, the atoms are combined.
One step in a series of steps that take place in a chemical change is a-----------.
chemical reaction
chemical change
a change that produces a new substance with new properties
A------is a particle in atom that has a positive charge.
proton
Melting ice is an example of a---------.
physical change
How is boiling water an example of a physical change?
The water change from a liquid to a gas, but the molecules are still water molecules and do not change into a different substance.