There is a theory which states that if ever for any reason anyone discovers what exactly the
Universe is for and why it is here it will instantly disappear and be replaced by something even
more bizarre and inexplicable. There is another that states that this has already happened.
- Douglas Adams
Atoms are the basic building blocks of matter that make up everyday objects.
- A desk, the air, even you are made up of atoms.
There are 90 naturally occurring kinds of atoms.
- Scientists in labs have been able to make about 25 more.
Living things are mostly made up of 4 elements
- Oxygen
- Carbon
- Hydrogen
- Nitrogen
Atoms are ageless
– Matter is conserved; it is neither created nor destroyed
Define:
Subatomic Particle_____________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
Element- _____________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
WebNotes:
Go to the website http://web.jjay.cuny.edu/~acarpi/NSC/2-matter.htm and answer the following
questions:
I. Matter and Energy
a) Everything in the universe is made of two things: _________________ and
____________________
b) Atoms are particles of elements,
______________________________________________________
c) Compound:
________________________________________________________________________
d) The difference between states of matter is due to
__________________________________________
(skip Piza, click arrow at bottom right to move on to next page)
II. Atomic Structure
a) Atoms are made of 3 different particles (include description):
i)
ii)
iii)
Draw a picture of an atom with the three subatomic particles in the correct arrangement
and label:
b) What keeps the electron and proton from crashing into each other? What is a good
example of this? (In your own words)
c) Describe how far away an electron orbits from the nucleus in your own words
d) It is not accurate to show an electron spinning around the nucleus like a ball in a circle
because . . .
e) Draw a more accurate way to describe the electron:
f) In a neutral atom, the positively charged protons are balanced by
_____________________________
Atomic Number =
_________________________________________________________________________
Atomic Mass =
____________________________________________________________________________
Practice – use the information given to complete the chart.
Element
Oxygen
Gold
Potassium
Sulfur
Hydrogen
Iron
Iodine
Uranium
Krypton
Silicon
Erbium
#
#
#
protons electrons neutrons
8
8
8
79
79
118
19
20
16
0
26
30
53
92
146
Atomic
Number
8
79
16
1
127
36
14
Atomic
Mass
16
197
39
32
1
83
28
68
167