Download Atomic Structure AKS Correlation Use the modern atomic theory to

Atomic Structure
AKS Correlation
Use the modern atomic theory to explain the characteristics of atoms
10a. discriminate between the relative size, charge, and position of protons, neutrons, and electrons in an atom
10c. explain the relationship of the proton number to the element’s identity
10d. explain the relationship of isotopes to the relative abundance of atoms of a particular element
10d1. differentiate between alpha, beta, and gamma radiation
__________________________________________________________________
a.
b.
c.
d.
Trace the development of the modern atomic theory.
Atomic theories
Democritus
Dalton
Thomson
Rutherford
Bohr
Modern Atomic
Cathode ray tube
Gold foil
Electrons found in
Atomos:
Theory:
Discovered e-,
experiment,
predictable shells,
indivisible
All matter made of plum pudding
discovered p+,
Bohr model
1st to think
atoms
model
Atoms mostly
about matter
Matter cannot be
empty space, dense
and its’ makecreated or
center
up of atoms
destroyed
Atoms of same
element look the
same
Chem reactions
occur when atoms
are rearranged
Compounds
formed by 2 or
more atoms
Describe the basic structure of the atom as protons, neutrons and electrons in specific arrangements. Identify the relative
location, size and charge of subatomic particles.
Define atom. What charge does an atom have?
Fill in chart below
proton
neutron
electron
Location
Nucleus
Nucleus
Electron cloud
Mass
1 amu
1 amu
0 amu
Charge
1+
0
1-
e. What does an atomic number represent? Atomic mass?
f. What is an isotope?
Isotope practice:
Name
Isotopic
Mass
Protons
notation
14
Carbon-14
14
6
6
Magnesium-32
Chlorine-40
Xenon-170
Zirconium-90
C
Neutrons
electrons
8
6
32
12 Mg
40Cl
17
170
Xe
32
12
20
12
40
17
23
17
54
54
116
54
90
40 Zr
90
40
50
40
54
According to the following isotopes information for this mystery element what would the average atomic mass be
most like? HONORS EXTENSION – ADD CALCULATIONS TO FIND AV. ATOMIC MASS
Isotope
12
X
Percent
10%
13
X
60%
X
10%
X
20%
6
6
14
6
15
6
A.
B.
C.
D.
X – 12
X- 13
X- 14
X- 15
12
13
14
15
(.1) = 1.2
(.6) = 7.8
(.1) = 1.4
(.2) = 3
1.2 + 7.8 + 1.4 + 3 = 13.4 amu
FILL OUT THE CHART BELOW.
Radiation type
Symbol
Alpha
4
Mass
Penetrating power
/Shielding/stopped by?
paper
2He
Beta
4
0
0
aluminum
-1e
Gamma
0
Cement or lead
0Y
0
Describe half life____The amount of time for ½ of an element to decay___________________________
How many grams of Radium is left after 4 half-lives if every half-life is two years and the original sample is
100grams. ______6.25g_________________________________________________
Compare and contrast fission and fusion._fission- splitting the nucleus of an atom fusion is putting more atoms
together to get bigger____________________________
Which is responsible for all elements heavier than He?_______fusion_______________________
Nuclear equations:
Match the equation with the type of radiation.
a. Alpha
b. Beta
c. Gamma
(a and c)
226
1.
88
(a)
2.
226
(b)
3.
14
2
0
Ra  4He
88
6
Ra  4He + oy +
+
2
C  14N + oB
7
-1
86
222
Rn
86
222
Rn