Properties of matter
_____ properties depend on the amount of matter that is present
Extensive
_____ are the horizontal rows on a periodic table
Periods
What is the SI unit for mass and length
grams and meters
Identify the number of significant digits in the following number: 0.0180
3
Name two different branches of chemistry
Organic, inorganic, biochemistry, physical chemistry
_____ properties can be observed without changing the identity of a substance
Physical
Elements share chemical properties that are within the same _____.
Groups
Convert 53 cm -> m using dimensional analysis
0.53 m
Identify the number of significant digits in the following number: 3008
4
What is the difference between accuracy and precision?
Accuracy is how close a set of numbers is to the accepted value; Precision is how close the set of numbers are to each other
Which state of volume has a definite volume and an indefinite shape?
Liquid
What elements share properties of both metals and nonmetals? Give an example of an element that fits this category
metalloids; boron, silicon, germanium, arsenic, antimony, tellerium, astatine, polonium
Convert 11,312 mg -> kg
0.011312 kg
Solve with sig figs.
8.1419 + 23.474 + 8.46
40.08
What is density, and what is its label?
the ratio of an object's mass to its volume
g/mL
What are the two types of mixtures, and describe each one.
Homogeneous: uniform composition
Heterogeneous: nonuniform composition
Give 2 examples of a nonmetal, with one being a solid at room temperature
carbon (s), nitrogen, oxygen, fluorine, phosphorus (s), sulfur (s), chlorine, selenium (s), iodine (s), etc.
Convert 0.612 mL -> L
0.000612 L
Solve with the proper number of Sig Figs
224 x 6.84 x 20
30,000
Differentiate inversely and directly proportional
Directly proportional occurs when two quantities divide to get a constant value: Inverse occurs when two quantities multiply to form a constant
Give an example of each type of property
- Extensive, Intensive, Physical, Chemical
Extensive: volume, mass, amount of energy
Intensive: melting and boiling point
Physical: scrapping, cutting, grinding
Chemical: burning, any chemical reaction, iron rusting
Give at least 3 properties of metals.
Malleable, Ductile, Good conductors of electricity, Most abundant, Solid at room temperature
Convert 112 km/h -> m/s
31.1 m/s
Solve with the proper number of Sig Figs.
1.00 x 10^5 / 4.2 x 10^2
2.4 x 10^ 2
What are the three types of research in chemistry, and briefly define each one.
Basic research: conducted for sake of knowledge only and not to meet practical goals
Applied research: used to meet goals defined by specific needs
Technological development: uses existing knowledge to improve quality of life