Chem Exam 1
Card Set Information
Chem Exam 1
not to hard
With extensive empirical evidence, a theory can become a law.
A hypothesis can be defined in multiple ways, such as a speculative law, immature theory, or a prediction
All work published within the scientific community is repeated to check the validity of the results.
Creativity plays no role in the practice of science
Science is not designed to answer moral, ethical, and aesthetic questions
How many significant figures does the following value have?
Place the following number into scientific notation. Be sure the significant figures stay the same!
8.50 x 10^-5
If the amount of gas and pressure are constant,when the temperature increases, the
volume of gas _________________.
If the amount of gas and the temperature are constant, when the volume decreases, the
If the amount of gas and volume are constant,
when the temperature increases, the pressure ___________________.
Consists of more than one type of atom
chemically combined in a fixed ratio.
Consists of one type of atom
Consists of more than one type of substance physically combined
Examples include iron, magnesium, and copper
dissolving sugar in hot tea
using an antacid (TUMS, ROLAIDS, etc) to neutralize excess stomach acid
was an idea introduced in Rutherford’s atomic model
An atom is mostly open space but has a region of concentrated positive charge
Consider Dalton’s Postulates on the nature of
a. All matter is composed of small, indivisible
particles called atoms.
b. All atoms of a given element are identical in mass and properties
What do the following atoms all have in common? (Ca = calcium)
Ca+2, Ca-40, Ca-41
number of protons
How many neutrons are present in the Li-6 isotope? (Li = Lithium)
How many electrons are in a Ba2+ ion? (Ba = barium)
Which element has the following electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^3
and how many valence electrons
statements explaining the behavior of ideal gases is FALSE
Gas particles exert significant attractive forces upon one another
A photon of which type of electromagnetic radiation has the highest energy
statements about bonding is FALSE
Ionic compounds exist as discrete molecules