Periodic Table A
The modern periodic table organizes elements according to this.
What is increasing atomic number?
The pattern of repeating properties displayed by elements in the periodic table
Periodic Law
How many valence electrons in Helium
2 valence electrons
The very reactive elements in group 1 are known as this.
What are alkali metals?
The horizontal rows on the periodic table.
What are periods?
The three classes of elements.
What are metals, nonmetals and nonmetals?
Elements that form a bridge between elements on the left and right sides of the periodic table
Transition Metals
The Valence Electrons for Nitrogen Family.
What are 5?
Reason Noble gases are stable.
What is a full outer energy level?
Being shiny, malleable, and conductors are properties of this class of elements.
What are metals?
The period numbers indicate this.
What is number of energy levels/ electron shells?
The reactive elements in group 2 are known as this.
What are alkali earth metals?
Elements in the same group share these characteristics.
What are chemical and physical properties, number of valence electrons?
The only nonmetal on the left side of the periodic table.
What is hydrogen?
The elements in group 7A are known as this.
What are the halogens?
Alkali Metals, Alkali Earth Metals, Transition metals
The vertical columns on the periodic table.
What are groups or families?
Group/family numbers can be an indication of this.
What is number of valence electrons?
The nonreactive elements in group 8A are known as this.
What are the noble gases?
Number of periods on the periodic table.
What is 7?