A one or two letter representation of an element

• Chemical Symbol

• Atomic Number

• Atomic Mass

• Isotopic Notation

the number of protons in the nucleus of an atom; determines the properties of an atom

• Chemical Symbol

• Atomic Number

• Atomic Mass

• Isotopic Notation

Tags

NGSS.HS-PS1-7

the number of protons and neutrons in the nucleus of an atom

• Chemical Symbol

• Atomic Number

• Atomic Mass

• Isotopic Notation

notation that shows the chemical symbol, atomic number (bottom number), and mass number (top number) for an isotope of an element

• Chemical Symbol

• Atomic Number

• Atomic Mass

• Isotopic Notation

Vertical columns on a periodic table that have similar properties and tell the number of valence electrons

• Periodic Periods

• Periodic Family

• Halogens

• Noble Gases

Horizontal rows, known as series, on the periodic table that have the same number of electron energy levels

• Periodic Periods

• Periodic Family

• Halogens

• Noble Gases

Group 7A. Contains nonmetals, 7 valence electrons in it's outermost energy level. Very reactive

• Periodic Periods

• Periodic Family

• Halogens

• Noble Gases

The elements in Group 8A of the periodic table. Nonreactive due to having a full valence shell of electrons (all 8).

• Periodic Periods

• Periodic Family

• Halogens

• Noble Gases

Elements that are lustrous, malleable, ductile, reactive, solid at room temp, and good conductors. Found on the left side of the periodic table.

• Metals

• Nonmetals

• Metalloids

Elements that are poor conductors of heat and electric current, can exist in any state of matter (typically gas), solids exist as brittle crystals, and have a variety of colors. Found on the right side of the periodic table.

• Metals

• Nonmetals

• Metalloids