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