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100
Atoms consist of a tiny nucleus surrounded by cloud-like regions containing these.

What is chemistry is all about electrons?

100
He proposed that at a given pressure and temperature, the volume of a gas is proportional to the number of particles of the gas.
Who is Avogadro (Amedeo)?
100
The columns and rows of the periodic table are referred to as these.
What are groups and periods?
100
Anything composed of atoms or parts of atoms.
What is matter?
100
3,750,000 in scientific notation.
3.75 x 10^6
200

Sulfuric acid, H2SO4, has two hydrogen atoms, one sulfur atom, and four oxygen atoms and is an example of this.

What is  chemistry is all about whole-number ratios of atoms?

200
He developed the theory of covalent bonding.
Who is Lewis (Gilbert)?
200
When a metal loses electrons to form positive ions, it is know as this.
What is a cation?
200
A single packet of electromagnetic energy; a quantum of electromagnetic radiation; a particle of light.
What is a photon?
200
0.001350 has this many significant digits.
What is four?
300
Hydrogen bonding is one example of this.

What is chemistry is all about electrical forces?

300
He proposed the first fully-formed periodic table.
Who is Mendelev (Dmitri)?
300
Elements are classified by these categories.
What are metals, nonmetals, and metalloids?
300
A force between two permanent dipoles.
What is a Keesom force?
300
Convert 3550 cm^3 to m^3.
What is 0.00355 m^3?
400
A theory, for one.

What is chemistry is all about modeling?

400
He developed the electronegativity scale.
Who is Pauling (Linus)?
400
Chemistry is all about electrons, and in particular these which determine what kinds of compounds will form.
What are valence electrons?
400
The calculations associated with chemical equations, in which given quantities of reactants or products are used to determine the required amounts of other reactants or the amounts produced of other products.
What is stoichiometry?
400

Convert 12.55 ft into yards.

What is 4.183 yards?

500
A ball being kicked or 2H2+O2->2H20 are examples of this.
What is chemistry is all about minimizing energy?
500
He first theorized that energy and light were actually, physically quantized.
Who is Einstein (Albert)?
500

In Mendelev's periodic table, there was no room for these types of elements.

What are the noble gases?
500
It states that at a given temperature, the volume of a fixed amount of gas varies in inverse proportion to the pressure.

What is Boyle's law?

500
Convert 15.90 mi/day into in/hr.
What is 41,980 in/hr?