Atomic Theory Flashcards
A substance made of two or more elements or compounds not chemically bonded to each other is a(n):
mixture
The basic particle from which all matter is formed is the:
atom
Hardness, texture, color, and freezing point are example of ________ properties of matter.
physical
A(n) _______ is a group of two or more atoms that are held together by chemical bonds.
molecule
Define: element
- a substance consisting only of atoms that all have the same numbers of protons in their nuclei
- elements cannot be broken down into simpler substances by any chemical reaction
Define: compound
a substance made up of two or more elements joined together by a chemical bond
Define: mixture
a substance made of two or more elements or compounds not chemically combined
Define: molecule
a combination or two or more atoms chemically bonded
What is the difference between a compound and a mixture?
a compound is chemically held together but a mixture is not
Compare and contrast elements and compounds
- an element is a material that consists of a single type of atom (all with the same number of protons)
- chemical bonds link elements together to form compounds (a substance of molecules?)
- a compound consists of two or more types of elements chemically bonded together
True/False: Table salt is an example of a(n) molecule.
False: Table salt is a compound because NaCl are bound by ionic bonds.
True/False: Matter is anything that has color and takes up space.
False: mass
True/False: A(n) physical property of a substance can only be observed if the substance changes into a different substance.
False: chemical
True/False: The boiling point of a substance is a(n) chemical property.
False: physical
True/False: A change that produces one or more new substances is called a physical change.
False: chemical
