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Periodic Table
Changes of Matter
Properties of Matter
Masses of Atoms
Structure of the Atom
100

an arrangement of the elements by increasing atomic number

What is the periodic table

100

the type of change that tearing paper is an example of

What is a physical change?

100

The temperature at which a substance changes from a solid to a liquid.

Who is melting point?

100
the smallest piece of matter that still has the properties of the element
What is an atom
100
particle with an electrical charge of 1-
What is an electron
200
Na on the periodic table
What is Sodium
200

the type of change that occurs in "Hot Hands"

What is a chemical change?

200

The amount of mass present in a given volume of a substance (one example of a characteristic property)

What is density?

200
a number equal to the number of protons in an atom
What is atomic number
200
particle with no charge
What is a neutron
300
a vertical column of elements on the periodic table
What is a group
300

the type of change where identity of the substance stays the same

What is a physical change?

300

Properties that can be tested without changing the chemical nature (identity) of a substance

What are physical properties?

300
the weighted average mass of the mixture of isotopes of an element
What is the average atomic mass
300
the small, positively charged center of the atom
What is the nucleus
400
a horizontal row of elements on the periodic table
What is a period
400

the type of change where identity changes

What is a chemical change?

400

Properties that cannot be tested without risking changing the identity of a substance

What are chemical properties?

400
atoms of the same element that have different numbers of neutrons
What is isotopes
400
particle with an electrical charge of 1+
What is a proton
500

the electrons found on the outermost level of an atom; equal to the last digit in the group number

What is are valence electrons?

500

bubbling, color change, materials getting either hot or cold, change occurs after mixing 2 or more materials

What is are signs of a chemical change?

500

Properties not affected by amount or shape of a substance and can be used to identify different types of matter

What are characteristic properties?

500
the sum of the number of protons and the number of neutrons in an atom
What is the mass number
500

an atom that has a positive or negative charge; an atom that is not neutral

What is an ion?