Name: _________________________________________ Date: ____________ Period: ____________
How is the number of each subatomic particle determined?
What is Chemistry?

Chemistry is the study of the composition and structure of ____________________ and
the _______________________ that matter undergoes.

Matter is anything that has ____________________ and takes up
____________________.

The building blocks of matter are called ____________________.
Classification of Matter:
Pure Substances
versus
Mixtures
_________________
_______________


than one
______________
________________
_________________
Found on the
one type of element
and/or
__________________
__________________
_______________________

combined
_______________________

combination of more
__________________
1 type of

___________________
Represented by
_______________________

Represented by
__________________
Atoms

Atoms can exist either ____________________ or in ____________________ with
other atoms
The ________________________
and ________________________
are found within the
_________________________ of
the atom.
Name: _________________________________________ Date: ____________ Period: ____________
How is the number of each subatomic particle determined?
Atoms: Protons

All atoms of the same element must contain the same number of
____________________ in the __________________________.

The number of ______________________ identifies the atom

This number is known as the ____________________________________.

This is abbreviated by the letter ___________.

Elements are arranged on the ______________________________________ by atomic
number.
Atoms: Neutrons

The nucleus of the atom also contains the ______________________________.

The number of neutrons in an atom may vary within the same element; these variances
are known as ______________________.

The number of neutrons does not significantly affect ______________________.
Atoms: Electrons

The electrons are found __________________________ the nucleus.

All atoms of the _________________ element contain the same number of electrons.

The ______________ of and _______________________ of electrons significantly
affects chemical properties.

In a chemical reaction, atoms ________________, _________________, or
_________________ electrons

In a neutral atom, the number of electrons equals the number of
_____________________________.
Nuclear Symbols
A
Z
A: ___________________________________________
X

The sum of the ______________________ and
______________________ found in the nucleus.
Z: ___________________________________________

The total number of ______________________________ found in the
nucleus
X: ___________________________________________
•
The abbreviation found on the ___________________________
•
The first letter is always ________________________________
•
The second letter (if there) is ____________________________
•
Only ________________________________letters may be used
–
Exception: lower case ________________