Rock Record
What is uniformitarianism?
The principle that Earth's history can be explained by current geologic processes
What are examples of a physical change?
Ripping, shredding, melting, freezing
An isotope will have the same number of what as the neutral element on the periodic table?
Protons & Electrons
A radioactive nuclide sample has a half-life of 4.0 days. If 2.0 kilograms of the sample remains unchanged after 16.0 days, what was the initial mass of the sample?
32
How many electrons are in the outer shell of group 13?
3
What is relative age?
The age of an object in relation to the ages of other objects
What are examples of a chemical change?
Burning, acid, rusting
Protons & neutrons
What happens during Gamma Decay?
No change to atomic number or mass
What do metals bond with? What do non-metals bond with?
Metals bond with non-metals
Non-metals bond with both metals & non-metals
What is absolute age?
The actual age an object is
What group on the periodic table make up most of the elements we use in our everyday lives?
Transition metals
What is an ionic Bond?
a bond between a metal & a nonmetal
The half-life of a radioactive nuclide is 8 hours. After one day (24 hours), approximately how much of an original 24 gram sample of this nuclide remains?
3g
Balance the Following Equation
__SnO2 + __H2 ----> __ Sn + __H2O
1,2,1,2
How many years are represented by a single varve?
1
Which is not a property of non-metals?
-Brittle
-Good Conductors
-Any phase @ Room Temperature
-Any Color
-Good Conductors
Non-metals are Bad Conductors of electricity.
What is a covalent bond?
A bond between two non-metals
What happens during Alpha Decay?
Atomic number decreases by 2; atomic mass decreases by 4
Balance The following Equation:
__ Fe + __ H2S04 ---->__Fe2(SO4)3 + ___H2
2,3,1,3
In terms of fossilization, what is Amber?
Tree sap that fossilizes insects
What three groups are only found in compounds because they are so reactive?
Alkali, Alkaline Earth, Halogens
Calculate the protons, neutrons, & electrons for the following Ions
32 Ge -3 73
53 I +4 127
Ge
P: 32
E: 35
N: 41
I
P: 53
E: 49
N: 74
What happens during Beta Decay?
One less neutron, one more proton
same mass, different number
What can stop alpha decay, beta decay, gamma decay, & Neutrons?
Alpha-paper
Beta-thin aluminum
Gamma-thick sheet of lead
Neutrons-thick wall of water