Periodic Table
How is the modern periodic table organized?
By number of protons. (Atomic number)
What is the positive charge in an atom's nucleus?
Protons
What is a physical change?
A change where only the physical properties of matter change.
Noble gases
What is the negative charge in an atom's outer shell(s).
Electrons
Who organized the periodic table by the elements atomic mass?
Dmitri Mendeleev
What is the neutral charge in an atom's nucleus?
Neutrons
What is the element in group 1 that has no family?
Hydrogen
The number of _______ _________ depends on the group an element is in.
Valence Electrons
What is another name for metalloids?
Semi-conductors
What is the name of the outer shell of an atom where electrons are?
Electron Cloud