Unit 1 and 2
The variable that changes
IV
Neutrons have a charge which is
neutral
Valence electrons exist in
the outermost energy level
Melting an ice cube is this type of change
physical
Force is defined as a
push or pull
This graph represents categories
Bar Graph
Elements in the same group have similar properties due to...
same number of valence electrons
Ionic bond is a bond between
metal and a nonmetal
A liquid with a pH of 7.4 would be classified as a(n)
(weak) base
Average speed is calculated by
dividing the total distance by the total time
The tool used to measure liquid volume
Graduated Cylinder
Isotopes have the same number of protons but different number of
neutrons
Which group makes up the most reactive nonmetals?
Halogens (group 17)
An acid contains more of this ion
H+
Newton's 1st Law of Motion states:
That an object in motion will stay in motion (at constant velocity) and object at rest will stay at rest until acted upon by an unbalanced force
The Number of Paperclips vs The Mass of Paperclips
(graph type)
Scatter Plot
Mass number is calculated by
adding protons and neutrons of one atom
Hydrogen (H) and Fluorine (F) make this bond
Covalent
The following reaction is classified as
C6H12O6 + 6O2 → 6CO2 + 6H2O + thermal energy
(endothermic and exothermic)
exothermic
A dog accelerates at 2.6 m/s2. His mass is 14.2kg. What was the force applied to his paws? Include unit!
36.92N or 37N
An environmentalist is asked to review a coal mining company. This would be invalid because of...
Bias
The development of the atomic theory demonstrates the nature of science because...
scientific ideas are durable yet subject to change as new data is collected.
How many energy levels (rings) does an atom of Oxygen have?
2
List the correct sequence for the coefficients for the (balanced) equation below
Li3PO4 + CaCl2 --> LiCl + Ca3(PO4)2
2 3 6 1
A paper airplane is flying at a velocity of 1.4m/s. A gust of wind accelerates it to a velocity of 2.9m/s in 2 seconds. What was the acceleration of the object?
0.75 m/s2