People
He began the transition from alchemy to true chemistry as we know it today.
Who is Robert Boyle?
A column of elements in the periodic table having similar valence properties in relation to their atomic numbers.
What is a family?
An element that is typically dense, solid, ductile, malleable, highly conductive, and chemically reactive.
What is metal?
An element's atomic radius is affected by these factors.
What are the number of energy levels and additional protons?
Lewis dot notation provides this information.
What is a visualization of valence electrons for an element?
He developed a system of symbols for naming elements using 1-2 letters of each element's Latin name.
Who is Jacob Berzelius?
A name for a row in the periodic table of elements.
What is a period?
An element with characteristics between those of metals and non-metals also called a semi-conductor.
What is a metalloid?
Atomic radius refers to____________----
What is the distance from the center of an atom's nucleus to its outermost energy level?
Electronegativity provides this information.
What is a measure of an element's ability to attract and hold electrons when bonded to other atoms.
He found that combustion requires oxygen, which meant that fire couldn't be an element because it requires more than one component.
Who is Antoine Lavoisier?
An element in group 18 on the periodic table having eight valence electrons that fill the outer energy level.
What is a noble gas?
Elements that are located on the right side of the periodic table.
What is a non-metal?
A transitional metal is characterized by these properties.
What is any elements in groups 3-13 of the periodic table typically having 2 valence electrons which are easily lost.
What can be determined about all elements in period 3 of the periodic table?
What is they all have electrons in the first, second, and third energy levels?
He is credited with one of the earliest forms of the periodic law.
Who is John Newlands?
Almost 80% of elements belong to this category.
What are metals?
An element having 2 valence electrons that tends to lose electrons to become a cation making it very reactive.
What is an alkaline metal?
The modern periodic table has ____________________ periods and ____________ groups.
What are seven periods and eighteen groups?
In general, transition elements have this many valence electrons.
What are one or two?
Mendeleev did this with his periodic table to predict discoveries of elements in the future.
What is left blanks for unknown elements?
An element in group 17 of the periodic table having seven valence electrons
What is a halogen?
An element in group 1 of the periodic table having one valence electron that it can easily lose to form a 1+ cation making it extremely reactive.
What is an alkali metal?
Referring to a periodic table, how many valence electrons does sodium, sulfur, and argon have?
What is sodium has one, sulfur has six, and argon has eight?
Because groups 13-16 contain metals, nonmetals, and metalloids they are known as this.
What are mixed groups?