Chapter 16

Smallest particle of an element that still retains the physical and chemical properties.

• Compound

• Quark

• Atom

Sum of # of protons and neutrons

• Atomic Number

• Mass Number

• Atomic Mass

Number of protons in an atom

• Atomic Mass

• Mass Number

• Atomic Number

Shorthand writing that has a capital first letter and a lowercase second letter if there is one.

• Atomic Mass

• Chemical Symbol

• Atomic Number

Atoms of the same element that have different #'s of neutrons

• Isotopes

• Atoms

• Quarks

Weighted average mass of all naturally occurring isotopes of an element measured in amu

• Mass Number

• Atomic Number

• Atomic Mass

Tags

NGSS.HS-PS1-8

Vertical Columns on the periodic table

• Groups

• Periods or Rows

Green boxes in the middle of the periodic table

• metalloids

• metals

• nonmetals

Elements on the right side of the table in yellow

• nonmetals

• metals

• metalloids

elements arranged by increasing atomic number -not atomic mass- and by periodic changed in physical and chemical properties.

• Mendeleev' Prediction

• Electron Cloud Model

• Periodic Table