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Introduction to
Matter
The Atom
Organizing the
Elements
Metals
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Metals
100
the smallest particle that can still be considered an element
What is an atom?
100
the different layers of the electron cloud
What are energy levels?
100
the average of all the isotopes of an element
What is atomic mass?
100
elements that are good conductors of heat and electricity
What are metals?
100
the deterioration of metals due to a chemical reaction in the environment
What is corrosion?
200
the negatively charged particles in an atom
What are electrons?
200
the number of protons in the nucleus
What is atomic number?
200
the arrangement of the elements created by Mendelev
What is the periodic table?
200
the shiny, reflective property of metals
What is luster?
200
the most reactive metals are in this group
What are alkali metals?
300
the positively charged particles in an atom
What are protons?
300
atoms with different numbers of neutrons in the nucleus
What are isotopes?
300
the letter or letters that represent an element
What is a chemical symbol?
300
a metal's ability to be hammered or rolled into shapes
What is malleability?
300
the second most reactive group of metals
What are alkaline earth metals?
400
the positively charged center of the atom
What is the nucleus?
400
the sum of the protons and neutrons in an atom
What is mass number?
400
the elements in a column
What is a group?
400
the ability of metals to be drawn into wires
What is ductility?
400
the metals in Groups or 3 through 12
What are transition metals?
500
the creator of The Atomic Theory was
Who is Dalton?
500
this person created the Atomic Theory
Who is Dalton?
500
the modern periodic table is arranged by increasing _____.
What is atomic number?
500
the ease and speed with which an element reacts
What is reactivity?
500
the two rows of elements placed on the bottom of the periodic table
What are the lanthanides and actinides?