Atoms
This term describes the electrons in the outermost shell of an atom.
What are valence electrons?
What group is in the last column of the periodic table? Is this a reactive group?
The Noble Gases. No, they are not reactive.
What type of chemical reaction is depicted here?
AB -> A + B
decomposition
What unit is force calculated in? Where do we get that unit from?
Newtons (N)
F=ma=kg*m/s2
A bond that forms when two atoms share their electrons.
What is a Covalent bond?
Which subatomic particle determines the atomic number of an element?
protons
What is the general term for the Group 17 elements? (F, Cl, Br, etc.)
Halogens
The balanced chemical equation for the synthesis of NaBr from Na and Br2.
What is
2Na + Br2 -> 2NaBr?
What force is pulling a falling skydiver down?
Weight/Gravitational Force; F=mg
Note: Just saying "gravity" here is not technically correct. The term "gravity" refers to the acceleration of the object, not the force acting on it.
The rate at which an object moves.
What is speed?
What does the atomic mass of an element represent?
The total number of protons and neutrons.
Which Periodic Table group does Magnesium belong to? (name, not number)
Alkali Earth Metals
How many calcium and chlorine atoms are needed to create one stable calcium-chloride molecule?
One Calcium atom; 2 Chlorine atoms
This describes the acceleration of a free-falling object.
What is constant acceleration?
A change in position measured by distance and time.
What is motion?
Iodine-131 has a half-life of 8 days. A patient received a certain amount of Iodine-131 as a treatment. After 16 days, the patient has ____% of the Iodine-131 isotope remaining in their system.
1/4 or 25%
Using the periodic table, determine which of these molecules is most likely to form:
HS, NaO2, Li2O, Be2Cl2
Li2O
What rule determines how many bonds an atom can form to achieve stability?
The Octet Rule
What is the net force acting on an object that is receiving 8N of applied force acting against 6N of friction?
2N
The speed and direction of a moving object.
What is velocity?
This process involves a large, unstable nucleus breaking into smaller pieces to release a large amount of energy.
What is nuclear fission?
This describes the trend of the tendency for alkali metals to react with other substances. (Hint: direction of the trend in the periodic table)
What is increasing from top to bottom within the group?
What is the mass of oxygen gas (in grams) required to completely react a 24 gram sample of methane gas (CH4)?
96 grams
Draw the Free Body Diagram for a person pushing a desk across a room. No need to include equations.
See paper.
The contact force that acts against gravity.
What is Normal Force?