States of Matter/Classification
Has a definite shape and definite volume.
What is a solid?
Composed of only one type of atom or molecule.
What is a pure substance?
This subatomic particles indicates the atomic number of an atom.
What is a proton?
This type of radioactive emission has a negative charge.
What is Beta Radiation?
The time required for half of the quantity of the substance to decay or transform into a different element or isotope.
What is a half life?
Property that a substance displays without changing its composition.
What is a physical property?
A substance composed of two or more elements in fixed, definite proportions.
What is a compound?
These two subatomic particles make up the nucleus of an atom.
What is a proton and neutron?
A high energy electromagnetic radiation.
What is Gamma Radiation?
Iodine-131 has a half-life of 6 days. How much of a 2000 milligram sample of iodine-131 would be left after 24 days?
After 24 days, 125 milligrams of the iodine-131 sample would be left.
Has an indefinite shape and an indefinite volume.
What is a gas?
This term describes a substance made up of only one type of atom and cannot be broken down into simpler substances by chemical means.
What is an element?
Atoms of the same element that have different number of neutrons.
What is an isotope?
A few sheets of ordinary paper can form an effective shield against what type of radiation?
What is alpha radiation?
The half-life of a certain isotope is 10 hours. After 30 hours, what fraction of a 500 milligram sample of this isotope remains?
1/8
Chopping wood for a fire is classified as a...
What is a physical change?
Sugar is classified as...
What is pure substance - compound?
In an atom, these negatively charged particles orbit the nucleus and are found in specific energy levels or shells.
What is an electron?
Who is going to win on Friday night?
IRONMEN!!!!!!!!
A substance has a half-life of 5 minutes. If you start with a 2000 milligram sample, what is the remaining mass of the substance after 20 minutes?
125 mg
This state of matter, often found in stars and neon signs, consists of ionized gases with free-moving electrons and ions, and is the most abundant state of matter in the universe.
What is plasma?
Salty was is classified as...
What is homogeneous mixture?
This model of the atom, proposed by Niels Bohr, describes electrons orbiting the nucleus in fixed energy levels.
What is the Bohr Model?
A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here:
MASS (amu) ABUNDANCE
22.1760 45.00%
23.1847 45.00%
24.1934 10.00%
The calculated atomic mass of Nivadium is:
What is 22.83 amu?
A substance has a half-life of 15 hours. After 45 hours, what is the remaining amount of a 600 milligram sample?
75 mg