Questions1
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 amount of sublevels.
What is four sub-levels?
the most reactive metals on the periodic table
What are alkali metals?
Rutherford's model of an atom.
What is the gold foil?
The amount of electrons in the 2nd energy level
What is 8 electrons?
A model with a nucleus in the middle surrounded by electrons in electron levels surrounding it.
What is the bohr's 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 group 3 are called.
What is the boron family?
Mendeleev organized the elements of his periodic table according to this.
What is increasing atomic mass?
The group on the period table that have seven valence electrons that tend to react violently with alkali metals and are more commonly known as this.
What are halogens?
Elements on the periodic table are classified as.
What are metals, non metals and metalloids?
Elements in the same group share this.
What are the same number of valence electrons
The formula for finding the number of neutrons.
What is the mass number - the atomic number?
The element that 1s2 2s1 electron configuration is.
What is Lithium?
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 four sublevels.
What are the s,p,d, and f?
The most stable group on the periodic table.
What are the noble gases?
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?