Atomic Theory
Who developed the term "atom"?
Democritus
Who developed the first periodic table?
Dmitri Mendeleev
What is the only subatomic particle with a negative charge?
Electron
Element symbol for Carbon
C
Which type of element is excellent at conducting electricity and/or heat?
Metals
Who developed the planetary model of the atom?
Niels Bohr
What is in row 5, column 4?
Zr (Zirconium)
What is Ionization Energy?
Energy needed to remove an electron(s) from an atom
Name for Pb
Lead
What does "ductile" mean?
Element that can easily be stretched into a wire or sheets
Who stated the exact location and/or position of an electron is uncertain?
Werner Heisenberg
How did [100] organize his periodic table?
Atomic Mass
An (or group of) atom that have gained one or more electrons, and have a corresponding charge?
Ion
Element symbol for Xenon
Xe
What looks like metals, but have the chemical reactivity of non-metals?
Metalloids
Who incorrectly used a cathode ray tube and plum pudding to develop the first atom model?
J.J. Thomson
What is excluded in the "main-block elements" that encompass columns 1-18?
Lanthanides and Actinides
What is the term for a metal's ability to react to other elements or compounds, and increases top to bottom, decreases left to right?
Metal Reactivity
Element symbol for Magnanese
Mn
What are the only two elements that are in a liquid state at room temperature?
Bromine and Mercury
Who conducted an experiment that showed that atoms were mostly empty space?
Ernest Rutherford
Why aren't elements with 3-letter symbols included on newer periodic tables?
They haven't been officially named by the IUPAC (International Union of Pure and Applied Chemistry)
In the chemical formula {Na+, P⁻³, Mg⁺², SO₄⁻²}, what is the charge for each element, in order?
-1, +3, -2, +2
Name for Column 12, Row 5
Cadmium
What type of element is brittle, if ever solid?
Nonmetals