Chapter 2 and 3 Vocabulary

Is the smallest piece of an element that still represents that element.

• Electron

• Atom

• Proton

• Neutron

Is a particle with one negative charge (1-)

• Electron

• Neutron

• Isotope

• Proton

Most of an atom's mass and positive charge is concentrated in a small area in the center of the atom.

• Atom

• Electron Cloud

• Ion

• Nucleus

Is an atomic particle that has one positive charge (1+).

• Electron

• Proton

• Neutron

• Electron Cloud

Is a neutral particle that exists in the nucleus of an atom.

• Isotope

• Ion

• Neutron

• Proton

Is the area around an atomic nucleus where an electron is most likely to be located.

• Atomic Number

• Atomic Mass

• Nucleus

• Electron Cloud

The number of protons in an atom of an element.

• Average Atomic Mass

• Atomic Mass

• Atomic Number

• Nucleus

Are atoms of the same element that have different numbers of neutrons.

• Isotope

• Atomic Number

• Radioactive

• Mass Number

Is the sum of the number of protons and neutrons in an atom.

• Halogen

• Ion

• Mass Number

• Proton

Is the average mass of an atom's isotope's, weighted according to the abundance of each isotope.

• Average Atomic Mass

• Ion

• Isotope

• Neon