Periodic Table 1
The electrons involved in chemical reactions are these.
Valence electrons
The electrons in the outer energy level are called this.
Valence electrons
The atomic number tells you this.
The number of protons (and electrons) an atom of an element should have
The reactivity of an element is dependent on this.
Valance electrons
the most reactive metals on the periodic table
Alkali metals?
What is the name of the diagram that depicts the valance electrons around the elements symbol
Lewis dot diagrams
An atom with a completely full outer most (valence) energy level is this.
Unreactive/ noble gas
A model with a nucleus in the middle surrounded by electrons in electron levels surrounding it.
Bohr model
The columns on a periodic table are called this.
Groups
These atoms have properties of both metals and non metals.
Metalloids
Elements in groups 3-12 are called what?
Transition metals
Mendeleev organized the elements of his periodic table according to this.
Increasing atomic mass
Group 17 contains highly reactive nonmetals with seven valence electrons that tend to react violently with alkali metals and are more commonly known as this.
Halogens
Elements in groups 13-16 contain one or more of these class of hybrid type elements.
Metalloids
Elements in the same group share this.
The same number of valence electrons
Where can we find non-metals on the periodic table?
On the right, groups 13-18 and hydrogen
Group 18 elements are extremely nonreactive nonmetals known as this.
Noble gases
Extremely reactive elements in group 1 have only 1 valence electron and are known as this.
Alkali metals
The rows on a periodic table are known as this.
Periods
The three classes of elements are these.
Metals, metalloids, and nonmetals
What groups are located underneath the periodic table?
Lanthanides and Actinides
The modern periodic table is organized according to this.
Increasing atomic number
This model was the first time that the nucleus was discovered by shooting alpha particles through gold foil.
Rutherford's model
What is an elements identity based on?
Protons
Very reactive elements in group 2 have only 2 valence electrons and are known as this.
Alkaline Earth metals