Vocabulary
Key Terms
Parts of an Atom
Periodic Table
Other
100
What is another name for a column on the periodic table?
Family or Group
100
The number of protons in an atom determines its what?
Atomic Number
100
What is the positive electrical charge in an atom?
Proton
100
What part of the periodic table shows the properties of elements that change in a pattern?
Periods
100
What is the element family which contains fluorine and chlorine?
Halogens
200
What is another name for a row on the periodic table?
Period
200
What Group contains the most elements?
Metals
200
What is the negative electrical charge in an atom?
Electron
200
What part of the periodic table tells us the number of valence electrons in an atom?
Family or Group
200
A substance made of 2 or more elements that are chemically combined in a set ratio is called a what?
Compound
300
What is the smallest particle of an element?
Atom
300
What system is used worldwide for organizing elements into categories?
Periodic Table
300
What is the neutral charge in an atom?
Neutron
300
The first periodic table arranged the elements in order of Increasing Atomic Mass and was created by who?
Mendeleev
300
A substance made from elements, compounds, or both that are in the same place, but are not chemically combined is called a what?
Mixture
400
What moves around the nucleus and are located on energy levels?
Electrons
400
Elements that share the characteristics with both metals and nonmetals are called what?
Metalloids
400
What contains the protons and neutrons in an atom?
Nucleus
400
The periodic table was updated in the early 1900's to organize the elements by what?
Atomic Number
400
Which scientific theorist believed that electrons move in specific orbits around the nucleus?
Niels Bohr
500
What do you call the simplest pure substances that cannot be broken down into any other substance and are called the basic substances of matter?
Elements
500
What do you call the electrons on the outer energy level invloved in bonding between atoms?
Valence Electrons
500
Where are the electrons located in an atom?
On energy levels surrounding the nucleus
500
What group of elements are found in Group 1 and are in the 1st column on the left?
Alkali Metals
500
Which scientific theorist conducted the Gold Foil experiment, which discovered that an atom's positive charge is located in the nucleus?
Ernest Rutherford
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