Atomic Theory
Hesienberg and this person came up with the Electron Cloud Model.
Schrodinger
The smallest particle of an element that still contains the same characteristics of that element is called a(n)...
What is the element that has an atomic symbol of H?
Hydrogen
The middle section of the periodic table contains a lot of elements that are called...
Transition Metals
If you know the atomic number, what two other pieces of information can you know in an electrically neutral atom?
# of p+
# of e-
electrons
a. The positively-charged particles found in the nucleus are called...
b. The negatively-charged particles found outside of the nucleus are called...
a. Protons
b. Electrons
The item on the periodic table that represents the number of protons is called the...
Atomic Number
This family of elements are poor conductors of electric current.
Nonmetals
The scientist who proved Democritus was right and that all matter is made up of atoms was...
John Dalton
Which scientist thought that electrons travled in circular paths around the nucleus?
Neils Bohr
What charge does a neutron have?
none (neutral)
The number below the Element Symbol and Name on the periodic table is the...
Average Atomic Mass
This element's atomic symbol if "Fe".
Iron
What do we call the outermost electrons?
Valence Electrons
The Gold Foil Experiment was run by this scientist, who found the positively-charged nucleus at the center of the atom.
Ernest Rutherford
The center of an atom that contains both protons and neutrons is called the...
nucleus
a. The vertical column of elements on the periodic table is called a...
b. The horizontal row on the periodic table is called a...
a. Group/Family
b. Period
List the following elements in order of number of protons, starting with the least:
Nobelium, Xenon, Potassium, Americium, Lithium, Niobium
Lithium (3)
Potassium (19)
Niobium (41)
Xenon (54)
Americium (95)
Nobelium (102)
List the maximum number of electrons held in:
a. the first energy level
b. the second energy level
b. 8
Which scientist thought all matter was made of small pieces that could NOT be cut into smaller parts; called these things "atomos."
Democritus
b. What do we call the force between electrons?
a. Attractive
b. Repulsive
a. Mendeleev arranged the elements by this...
b. Moseley arranged the elements by this...
a. Atomic Mass
b. Atomic Number
List the following elements in order of average atomic mass, starting with the largest value:
Tungsten, Antimony, Mercury, or Gold
Mercury (200.59)
Gold (196.97)
Tungsten (183.84)
Antimony (121.76)
Draw a Bohr Model for Oxygen (mass number = 16).
Make sure there are 2 energy levels (2 e- in the first, 6 e- in the second).
8 p+ and 8 n0 in then nucleus.