Unit Conversions
The Periodic Table
The Atom
Scientific Notation & Sig Figs
Mystery
100
1 liter is this many times larger than a milliliter.
1000
100
The elements in the modern periodic table are arranged in this format.
Increasing atomic number
100
This person was the first to describe the atom.
Democritus
100
The number 505020 has this many significant figures.
5
100
This is the unit used to measure mass in the metric system.
grams
200
4.56 g = 4560 mg
This is considered a(n) ______________________.
conversion factor
200
This group of elements is nonreactive.
noble gases/group 8
200
The electron was discovered by this person after his work with cathode ray tubes.
J.J Thomson
200
6.82 x 104 has ________ significant figures.
3
200
This person developed the first model of the periodic table.
Dmitri Mendeleev
300
A megameter is ______ times larger than a meter.
1 million
300
An atom of sulfur has this many valence electrons in its outer shell.
Six
300
This subatomic particle determines the identity of an atom.
proton
300
The number 0.0002500 will have a ___________ exponent when written in scientific notation.
negative
300
The particles in this state of matter have the most energy.
Gases
400
Conversion factors are useful for this reason
They help express the same value using different units.
400
Li (lithium) is ________ electronegative than F (fluorine).
less
400
This element has this atomic number
37
400
276000 written in scientific notation is
2.76 x 105
400
How many electrons are found in arsenic's (As) outer shell?
5
500
This is the system used in all scientific measurements.
The Metric System
500
This explains that atoms tend to form compounds in a way that gives them a full valence shell like that of noble gases.
The Octet Rule
500
The following isotope of krypton has this many neutrons.
42
500
The first rule of determining significant figures states this
all non-zero digits will ALWAYS be significant
500
The following is the Bohr model of the element ____________.
Aluminum