Chapter 9 Understanding the Atom Vocab Quiz

The smallest piece of an element that still represents that element

• Ion

• Atomic Number

• Atom

• Nucleus

A particle with one negative charge (-1)

• Electron

• Ion

• Proton

• Neutron

A small area in the center of an atom where most of an atom's mass and positive charge is concentrated

• Electron Cloud

• Nucleus

• Proton

• Isotope

An atomic particle that has one positive charge (+1)

• Electron

• Neutron

• Ion

• Proton

A neutral particle that exists in the nucleus of an atom

• Electron

• Neutron

• Electron Cloud

• Proton

An area around an atomic nucleus where an electron is most likely to be located

• Nuclear Decay

• Nucleus

• Electron Cloud

• Atom

The number of protons in an atom of an element

• Atomic Number

• Mass Number

• Average Atomic Mass

• Nuclear Decay

Atoms of the same element that have different numbers of neutrons

• Radioactive

• Neutrons

• Ions

• Isotopes

The sum of the number of protons and neutrons in an atom

• Average Atomic Mass

• Atomic Number

• Mass Number

• Electron Cloud

The average mass of the element's isotopes, weighted according to the abundance of each isotope

• Average Atomic Mass

• Atomic Number

• Mass Number

• Nuclear Decay