Early Elements (Before 1700)
Q: What is the first metal used by humans?
Copper
This gas was discovered by Joseph Priestley and is essentia
Oxygen
This Russian scientist is credited with creating the periodic table.
Dmitri Mendeleev?
This scientist developed the modern atomic number system.
Henry Moseley
This is the only metal that is liquid at room temperature.
Mercury
Q: Which element’s name means "water producer" in Greek?
Hydrogen
Antoine Lavoisier is known as the "Father of Modern ___."
Chemistry
Mendeleev left gaps in his table for undiscovered ___.
Elements
In 1913, Niels Bohr proposed this model of the atom.
Bohr Model
This gas makes up about 78% of Earth’s atmosphere.
Nitrogen
This soft metal was known as “plumbum” by the Romans
Lead
his scientist proposed that elements are made of tiny particles called atoms.
John Dalton
Mendeleev arranged the elements in order of increasing ___.
Atomic Mass
This radioactive element was discovered by Marie Curie.
Radium
This element is the lightest and most abundant in the universe.
Hydrogen
Which element was called "brimstone" in ancient times?
Sulfur
This element was discovered in 1789 and was later used in nuclear power.
Uranium
This element was predicted by Mendeleev and later discovered in 1886.
Germanium
In 1940, this first man-made element was created.
Neptunium
Diamonds are made of this element.
Carbon
This element was first isolated by Hennig Brand from urine in 1669.
Phosphorous
In 1864, John Newlands proposed this "musical" pattern in the elements.
Law of Octaves
The modern periodic table arranges elements by this number instead of atomic mass.
Atomic Number
The most recent elements added to the periodic table belong to this group.
Superheavy metals
This is the rarest naturally occurring element on Earth.
Astatine