Chem 1 H Atomic Theory & Atomic Structure

protons + neutrons

• Subatomic Particles
• Atomic Number
• Atomic Mass
• Gluons

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

The units for frequency are measured in _____________.

• hertz
• seconds
• m/s
• m

Oxygen has an atomic number of 8. What can you conclude?

• An atom of oxygen weighs 8 atoms
• An atom of oxygen has 4 protons and 4 electrons
• An atoms of oxygen has 8 postitrons
• An atom of oxygen has 8 protons

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

• 10

• 2

• 8

• 18

What is the mass number of the most common isotope of Fluorine?

• 18.9984

• 9

• 18

• 19

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

A charged atom

• Ion
• Isotope
• Electron Cloud
• Quark