Atomic Theory
& History
& History
Mixtures & Pure
Substances
Substances
Isotopes
Ions
Nuclear Equations
Half Lives
Radiation
100
The first atomic model was created by Dalton who described atoms as ___________. (2 words)
What are "indestructible spheres"?
100
A pure substance contains only ____, _____ or _____.
What are "atoms of the same element", "one type of molecule" and "one type of compound"?
100
An isotope has an unequal amount of _____ and ______.
What is "protons" and "neutrons"?
100
An ion has an unequal number of ______ and ______.
What are "Protons" and "Neutrons"?
100
A beta particle is written as ______ and an alpha particle is written as _______
What is
0/-1 eand4/2 He
100
A 1/2 life is how long it takes for 1/2 of a ______ to _____.
What is "radioactive isotope" and "decay"?
100
The three types of radiation are ____, ____ and _____
What are "Alpha, Beta and Gamma?"
200
Thomson's model added the _____ and Rutherford's model added the ______.
What are "electrons" and "protons"?
200
While sea water is a ____ mixture, fruit salad is a _____ mixture.
What is "Homogenous" and "Heterogeneous"?
200
While atoms are neutrally charged, isotopes are ____ charged.
What is "neutrally"?
200
A Barium ion has a charge of +2. This means that, after Barium becomes an ion, it has __ electrons.
What is "54"?
200
The stable isotope product of the following nuclear equation is _________.
20/9F + 4/2He ->
What is
24/11Na
200
If I started with 4g of a radioactive isotope and 5 1/2 lives have passed how much of my radioactive isotope do I have left?
What is "0.125g"?
200
Beta radiation is ____ harmful than gamma radiation.
What is "skin" or "a thin sheet of paper"?
300
We now know that electrons live outside the _____ in an area called the _______.
What is "nucleus" and "electron cloud"?
300
The following picture is a ________.
What is "heterogeneous"?
300
A silver isotope has a mass number of 115, which means it has ____ neutrons.
What is "68"?
300
An atom that contains 10 protons, 13 electrons and 11 neutrons has a _____ charge.
What is "-3"?
300
The stable isotope product of the following nuclear equation is ________.
32/14Si -> 0/-1e
What is
32/15P
300
I have 20 g of Gold-195 remaining after 16.14 days. If the 1/2 life of this isotope is 2.69 days, there ____ g of initial Gold-195.
What is "1,280.0g"?
300
_____ radiation is the most harmful form of radiation to organic life.
What is "gamma"?
400
There has been a total of ____ atomic models throughout history (not including Democritus)
What is "6"?
400
The following particle diagram represents a _______.
What is "homogenous" mixture?
400
Two isotopes of sulfur and aluminum have 14 neutrons each, which means that the sulfur isotope has a mass number of ____ and the aluminum isotope has a mass number of ____.
What is "30" and "27"?
400
In order for iron to bond with lithium, 4 lithium atoms are needed to give an electron to the iron atom. After this bond is formed, there are __ total electrons in the lithium atoms alone.
What is "8"?
400
Gold-215 undergoes alpha absorption and turns into ________.
What is "Thallium-219"?
400
The half-life of a specific igneous rock is 150 million years ago. If I have 1/8th of the original amount left, then I know that ____ years have passed.
What is "forty five million" or "450,000,000 years"?
400
To be protected from gamma radiation, you need to be protected with ______.
What is "6 feet of concrete" or "3 feet of lead"?
500
It took the world _____ years before Democritus's theory was re-discussed by Dalton.
What is "2,000"?
500
The following picture is a ________.
What is "heterogeneous"?
500
A specific hydrocarbon contains 2 carbons and 6 hydrogens. Each Hydrogen gains a charge of +1 and each Carbon gains a charge of -4. The hydrocarbon contains a total of _____ electrons.
What is "18"?
500
Lead-206 is a stable isotope that eventually came from the radioactive decay of Uranium-238. If the unstable uranium isotope undergoes beta decay 6 times, how many times does it undergo alpha decay to become Lead-206?
What is "8"?