Lesson 1 Introduction to Atoms
Transcript Lesson 1 Introduction to Atoms
Lesson 1: Introduction to
1.) How did atomic theory
2.) What is the modern model
of the atom?
How did atomic theory develop?
The smallest particle
of an element
Atoms cannot be broken into
that atoms were
like bowling balls
that could not be
Atoms are made of smaller parts
Negatively charged particles
in an atom
Atoms contain a positive charge
An atom has electrons
scattered throughout it
like seeds in a
Thomson suggested that atoms had negatively charged electrons set
in a positive sphere. Each electron is represented by the symbol e−.
An atom is mostly empty space with a
The center of an atom
Positively charged particles
in an atom’s nucleus
The pit models the nucleus of an
atom and the fruit is the space
According to Rutherford’s model, an atom was mostly open space. The
“6+” in the model means that there are six protons in the nucleus.
Electrons are found in specific orbits
Electrons move within a cloudlike