Chem, Chapter 4 Isotopes

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Measure mainly of the nuclear particles: protons + neutrons

• Subatomic Particles
• Atomic Number
• Atomic Mass
• Gluons

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

Atoms of the same element with a different number of neutrons

• Ion

• alloy

• Isotope

• 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

Calculation used to find the number of neutrons in an atom

• Mass Number- Atomic Number

• Atomic Number - Mass Number

• Mass Number - Electrons

• protons = electrons = neutrons

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

The _________ of an element equals the number of protons in an atom of that element

• mass number
• atomic weight
• atomic number
• isotopes

The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

• mass number

• atomic number

• ionic charge

• isotope weight