Elements
Nitrogen
Symbol for Boron
B
The periodic table is arranged by increasing this number.
Atomic Number
Metals are usually good conductors of this and electricity.
What is heat?
This scientist created the first widely accepted periodic table.
Demetri Mandelev
What element has the atomic number 1
Hydrogen
Symbol For Water
H2O
Rows on the periodic table are called this.
Periods.
Elements that are dull and brittle are usually classified as these.
What are Nonmetals
This scientist discovered the nucleus of the atom.
Ernest Ruthford
This element is necessary for us to breathe and supports combustion (fire).
oxygen?
Symbol for neon
Ne
What are columns called on the periodic table
Groups (Families)
Elements that are dull and brittle are usually classified as these.
What are Mettaloids
This scientist developed the modern atomic theory in the early 1800s.
John Dalton
This element is used in pencils and is a form of carbon.
Graphite
Symbol for Zinc
ZN
Elements in the same group have the same number of these.
Valence Electrons
This tells you the number of protons in an atom.
Atomic Number
This scientist discovered electrons.
J.J Thomson
This element is a shiny metal that is liquid at room temperature.
Mercury
Symbol for Tin
Sn
This group of elements rarely reacts with other elements.
What are noble gases
This equals protons plus neutrons.
What is Atomic Mass?
This scientist improved the periodic table by arranging elements by atomic number.
Henry Mosley