Chapter 12 lesson 1

The model of our planetary system is

often referred to as the solar system model because electrons orbit

the atom’s central nucleus.

• Dalton Model

• Bohr's Model

• Thomson Model

• Rutherford Model

a student of Thomson’s, published

a model of the atom with a central, positively charged nucleus

orbited by negatively charged electrons.

• Thomson

• John Dalton

• Rutherford

• Bohr

the negatively charged

electrons were the “blueberries”

suspended in the “muffin” of positive

charges. His model was discredited

upon the discovery of the nucleus

of atoms.

• Thomson's Model

• John Dalton

• Bohr's

• Rutherford

proposed that all matter was composed of atoms.

• Rutherford

• Bohr's

• J.J. Thomson

• John Dalton

The tiny particles that make up

all matter.

• atom

• nucleus

• proton

• neutron

Tiny particles contained in

the nucleus of an atom with a positive

electrical charge

• electrons

• protons

• neutrons

• atoms

The center of an atom; it is

often the largest and most visible object

inside a cell.

• proton

• nucleus

• electron

• electron

Tiny particles contained

in the nucleus of an atom with no

electrical charge

• neutron

• electron

• protons

• atoms

The simplest form of matter

that cannot be broken down into

anything simpler without losing its

chemical properties

• proton

• element

• electron

• neutron

The cloud of negatively

charged particles surrounding the

nucleus of every atom

• Joseph

• proton

• electron

• electron