SFSc5#B1
Terms
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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.