LEC 1&2
Natural Science is divided into three categories: Life Science, Earth Science, and?
Physical Science
Convert 1.4 ft to in
16.8 in
The building block of all matter
atom
The First person to work on the atomic model before Aristotle and John Dalton is?
Democritus
What is the atomic mass of Nitrogen
14.0067
The Scientific Method goes as following Observation, Question, Hypothesis, ?, Conclusion, Result
Experiment
How many sig figs are in
0.0003480
4
Anything that is not a pure substance; a physical combination of two or more substances
Mixture
By the late 1700s scientists discovered the two types of electrical charges. What are the two types of charges
Positive (+) and Negative (-)
A Negatively charged ion is called an
Anion
What is the SI unit for temperature
Kelvin (K)
Convert 415.6 x 107 kg to scientific notation
4.156 x 109 kg
A sample of aluminum has a volume of 14.3mL and a mass of 36.9g. What is the density of aluminum? Round answer to tenth.
2.6 g/mL
Hantaro Nagaoka suggested what model
Saturnian Model
True or False
The element number increases with the atomic mass
True
What is the number for the prefix nano- (n)
10-9
Convert 1.09 km to m
1090 m
Describes how a substance changes in the presence of another substance or under certain conditions
Chemical Change/Property
Who developed the Plum Pudding Model
J.J. Thompson
In the movie we watched, Sid named the eggs he found as Eggbert, Shelly, and ?
Yoko
The degree of exactness of a measurement is called
Precision
Convert 0.45Mg to cg
(give answer in scientific notation)
4.5 x 107 cg
True
The branch of physics that explores the behavior of matter and energy at the atomic and subatomic level is called
Quantum Mechanics
Changing an elements electrons by adding to it or taking one away will make it an ?
Ion