Periodic Table
Introduction to Matter
Atomic Structure
Nuclear Chemistry
Chemical reactions
100
What are the elements in Group 18 called ?
Noble Gases
100
X: Element
Y: Compound
Z: Compound
W: Mixture
100
2 sub-atomic particles that are inside the nucleus of an atom
Protons and neutrons.
100
In a radioactive reaction, U-235 turns into Np-235. What kind of decay happened?
Beta decay.
100
A bond between metal and a nonmetal
Ionic bond.
200
What is the most likely charge on group 1 elements and what kind of ion will they form?
+1; cation.
200
A block of substance has a mass of 24 g with a volume of 12 cm3? What is that substance most likely?
Salt.
200
Is the following electron configuration representing a ground state or an excited state of the atom? What atom is this?
Ground state and Carbon.
200
The most penetrating type of radioactivity is _______________.
Gamma ray.
200
A chemical reaction where two elements in different compounds trade places is what ?
Double Replacement
300
What is this diagram called?
Bohr's model.
300
If 12 g of hydrogen reacts with 6g of oxygen according to the following reaction, how much water will be formed?
18 g of water.
300
How many protons, electrons and neutrons are in Manganese?
25 protons, 25 electrons and 30 neutrons.
300
Co-60 has a half life of 6 years. What percentage of Co-60 would be left after 18 years? (Hint: You are starting with 100%).
12.5%.
300
Name of the compound between Lithium and Nitrogen
Lithium Nitride.
400
How many valence electrons are in group 16 elements and what is the charge on them?
6 valence electrons and -2 charge.
400
State of matter than can change shape but has fixed volume
liquid state
400
The black dots around the modern atomic model (on the left) are called?
Electron cloud.
400
Co-60 has a half life of 6 years. How long will it take for 40g of Co-60 to decompose to 2.5g?
24 years.
400
How many bonds will carbon hydride?
4.
500
What are the horizontal rows and the vertical columns on the periodic table called?
Horizontal rows = Period.
Vertical columns = Groups.
500
Physical change or chemical change:
Boiling water?
Physical change
500
Oxygen has three isotopes: Oxygen-16, Oxygen-17, and Oxygen-18. The average atomic mass of oxygen is 15.999 amu. Which isotope is more abundant?
Oxygen-16.
500
Mg-28 absorbs a neutron and produces an atom of N-16 and three neutrons. What other element is produced in this reaction? (Mass and element)
Boron-10.
500
What type of reaction is depicted in the following image?
Combustion reaction.