Unit 2 Vocabulary 2022

Periodic Table

• size of an atom

• A chart of the elements showing the repeating pattern of their properties

• A measure of the ability of an atom in a chemical compound to attract electrons

• Characteristics that can be observed without changing the identity of the substance

Atomic Radius

• size of an atom

• A chart of the elements showing the repeating pattern of their properties

• A change in matter that produces one or more new substances

• the degree of compactness of a substance.

Chemical Change

• A change in matter that produces one or more new substances

• Characteristics that can be observed without changing the identity of the substance

• A group of atoms bonded together

• A chart of the elements showing the repeating pattern of their properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Molecule

• the degree of compactness of a substance.

• 2 or more atoms bonded together.

• A change in matter that produces one or more new substances

• Elements made of single atoms not connected to each other: Mon means 1.

Tags

NGSS.MS-PS1-1

Conductivity

• The ability to dissolve in another substance such as in water.

• Group 18: All have a complete valence electron shell.

• The ability of an object to transfer heat or electricity to another object.

• Elements that are poor conductors of heat and electric current

Metals

• Vertical columns on the periodic table: Shows the number of valence electrons for the whole group.

• Horizontal rows on the periodic table: Shows the number of energy levels (shells) the atom has.

• Horizontal rows on the periodic table: Shows the number of energy levels (shells) the atom has.

• Elements that are good conductors of electric current and heat. Malleable, Ductile

Nonmetals

• Elements that are poor conductors of heat and electric current

• Elements that are good conductors of electric current and heat.

• Elements that have properties of both metals and nonmetals.

• Group 18: All have a complete valence electron shell.

Metalloids

• Elements that are poor conductors of heat and electric current

• Elements that are good conductors of electric current and heat.

• Group 18: All have a complete valence electron shell.

• Elements that have properties of both metals and nonmetals. Semiconductors

Noble Gases

• Elements that are good conductors of electric current and heat.

• Group 18: All have a complete valence electron shell.

• Vertical columns on the periodic table: Shows the number of valence electrons for the whole group.

• Elements that have properties of both metals and nonmetals.

groups/families

• Vertical columns on the periodic table: Shows the number of valence electrons for the whole group.

• Formed when one or more electrons are transferred from one atom to another

• Horizontal rows on the periodic table: Shows the number of energy levels (shells) the atom has.

• Contain two or more atoms of the same element that are united chemically