Introduction: Elements and Atoms

What is the smallest particle of matter?

An element is a substance consisting of __________________________________

• more than one kind of atom

• at least one kind of atom

• only one kind of atom

Sub-atomic particles are larger than atoms.

• True

• False

Which sub-atomic particle is represented by the blue balls?

• protons

• neutrons

• electrons

Protons are located on the outer shell.

• True

• False

In element notation 'A' represents the mass number.

• True

• False

In element notation, what does the 'Z' tell us?

• mass number

• atomic number

• number of protons

• number of neutrons

• number of electrons

How many known elements are in the periodic table?

Identify the atom described by name and mass number (example oxygen-16)

The atom with 2 neutrons and 1 proton is

Identify the atom described by name and mass number (example oxygen-16)

The atom with 17 electrons and 18 neutrons is