unit 1 Flashcards
what is an example of a chemical change?
broiling a steak on a grill
What is an example of a physical property?
lead becomes a liquid when heated to 601°C.
What cannot be separated into simpler substances by chemical means?
element
How many significant figures are in 0.004900?
4
What did Millikan’s oil-drop experiment establish
the charge on an electron.
What is the term for the total number of neutrons and protons in the nucleus of each atom of an element?
mass number
As the number of protons increases, stable nuclei will___________.
have an increased ratio of neutrons to protons.
The elements in a column of the periodic table are known as_________.
a group.
Rutherford’s experiment with alpha particle scattering by gold foil established that _______________.
protons are not evenly distributed throughout an atom.
The shape of an atomic orbital is associated with __________.
the angular momentum quantum number (l).
Atomic orbitals developed using quantum mechanics _______________.
describe regions of space in which one is most likely to find an electron.
What is defined as the number of waves that pass through a particular point in one second?
frequency
