Chapter 4-1 Atoms and the periodic Table

The atom is the basic
building block of all

______.matter

What Is An Atom?

•

Everything in the _Universe is made of atoms.

•

An atom is made up of mostly _______ space.

•

Groups of atoms held together are called __________.

•

_________ are made up of only one type of atom.

Key Facts About Atoms

empty

molecules

Elements

•

Everything in the universe is made of atoms.

•

An atom is made up of mostly _______ space.

•

Groups of atoms held together are called __________.

•

_________ are made up of only one type of atom.

universe
Key Facts About Atoms

empty

molecules

Elements

•

Atoms are made up of smaller parts called
_________ particles.

•

The three subatomic particles are _________,
_________, & _________.

•

The center of an atom is called the _________.

•

The _________ of an atom comes mostly from the
nucleus.

Parts Of An Atom

subatomic

protons

neutrons

electrons

nucleus

mass

​Standard PS. M2 Atoms and

                 PS.M3 Using the Periodic Table

A.Describe the location, charge, and relative size of a proton, Neutron, and electron

B Use information from the periodic table to calculate the number of protons, neutrons, and electrons. Diagram/ make a simple Bohr model of an element.

ELECTRON

NEUTRON
PROTON

Parts Of An Atom

● Symbol:

○ p or p+

● Charge:

○ positive (+)

● Location

○ nucleus

● Mass

○ 1 amu

Proton

● Symbol:

○ n or n0

● Charge:

○ no charge (0)

● Location

○ nucleus

● Mass

○ 1 amu

Neutron

● Symbol:

○ e or e-

● Charge:

○ negative (-)

● Location

○ electron cloud
(outside the nucleus)

● Mass

○ 1 / 1836

Electron

ELECTRON

NEUTRON
PROTON

Parts Of An Atom

THE END

1.
All matter is made of atoms.
•

True

2.
Atoms are made of completely solid space.
•

False

3.
Electrons are larger than protons.
•

False

True or False?

Checking For Understanding

4.

The nucleus of an atom is always positively charged.
•

True

5.

Most of the mass of an atom comes from the protons
& neutrons in the nucleus.
•

True

6.

The model of an atom has not changed over the years.
•

False

Checking For Understanding