Periodic Table Origins
I am the Russian chemist who created the periodic table in the 1860's.
Who is Dimitri Mendeleev?
A horizontal row of the periodic table is called this.
What is a period?
Atomic radius ________ as you go right to left across a period and down a column.
What is increases?
A wave is a disturbance in a medium that transfers energy but not this.
What is mass/matter/particles?
Max Planck believed energy is not emitted continuously, but rather in ______________.
What is discrete amounts or "chunks"?
In 1913, I proved that every element's identity is determined by the number of protons it has.
Who is Henry Mosely?
A vertical column in the periodic table is called this.
What is a group or family?
Electronegativity ________ as you go right to left across a period and down a column.
What is decreases?
Ultraviolet light has a higher _________ than visible light.
What is frequency/energy?
This effect, discovered by Albert Einstein, displays particles of light knocking electrons off the surface of metals.
What is the photoelectric effect?
Mendeleev organized the periodic table by increasing this quantity.
What is atomic mass/mass number?
Elements in this group are highly reactive metals, soft, shiny, and have 1 valence electron.
This element has the highest electronegativity of any element.
What is fluorine?
Radio waves have a higher ________ than visible light.
What is wavelength?
This is the lowest electron energy level.
What is the ground state?
Mendeleev grouped elements with similar properties in the same __________.
What is column/group/family?
Elements in this group are highly reactive nonmetals with high electronegativities and have 7 valence electrons.
What is group 17/halogens?
This element has the largest atomic radius of any element.
What is francium?
All electromagnetic radiation (light) travels at this speed.
What is 3 x 108 (300,000,000) meters/second?
What is absorbed/gained?
Mendeleev correctly predicted the existence of this element which he named "eka-aluminum".
What is gallium (Ga)?
Elements in this group are all gases and are very nonreactive.
What is group 18/noble gases?
These elements are considered to have nonexistent electronegativities.
What are the noble gases/group 18 elements?
This represents the distance a crest or trough is from the equilibrium (center portion of a wave).
What is amplitude?
The elemental spectral lines seen through a spectroscope represent this.
What is electrons releasing energy/electrons dropping down in energy level?