Periodic Table 1
The electrons involved in chemical reactions are these.
What are valence electrons?
The electrons in the outer energy level are called this.
What are valence electrons?
The atomic number tells you this.
What is the number of protons (and electrons) an atom of an element should have?
The reactivity of an element is dependent on this.
What is the ability of an atom to either completely fill or empty its outer most energy level?
the most reactive metals on the periodic table
What are alkali metals?
The first known model of the atom. Just shaped like a ball.
What is Dalton's model?
An atom with a completely full outer most (valence) energy level is this.
What is unreactive/ noble gas?
A model with a nucleus in the middle surrounded by electrons in electron levels surrounding it.
What is the bohr model?
The columns on a periodic table are called this.
What are groups?
These atoms have properties of both metals and non metals.
What are metalloids
Elements in groups 3-12 are called what?
What is transition metals
Mendeleev organized the elements of his periodic table according to this.
What is 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.
What are halogens?
Elements in groups 13-16 contain one or more of these class of hybrid type elements.
What are metalloids?
Elements in the same group share this.
What are the same number of valence electrons
Where can we find non-metals on the periodic table?
Group 18 elements are extremely nonreactive nonmetals known as this.
What are noble gases?
Extremely reactive elements in group 1 have only 1 valence electron and are known as this.
What are alkali metals?
The rows on a periodic table are known as this.
What are periods?
The three classes of elements are these.
What are metals, metalloids, and nonmetals?
What groups are located underneath the periodic table?
Lanthanides and Actinides
The modern periodic table is organized according to this.
What are by increasing atomic number?
This model was the first time that the nucleus was discovered by shooting alpha particles through gold foil.
What is Rutherford's model?
This person's model was discovered using cathode ray tubes. It is typically referred to as the Plum Pudding Model.
Who is J.J. Thomson?
Very reactive elements in group 2 have only 2 valence electrons and are known as this.
What are alkaline Earth metals?