Who was credited with first organizing the modern periodic table?
Dmitri Mendeleev
What is the measure of the attraction between the nucleus and shared valence electrons?
Electronegativity
How many valence electrons does the Halogen group have?
7
What is the distance from the center of an atom's nucleus to its outermost electron?
Atomic radius
Who was the first to quantify electronegativity?
Linus Pauling
As you go from top to bottom in the periodic table, the atomic radii....
Increases
How many valence electrons does the Boron group have?
3
What does Germanium, Arsenic, Antimony, and Tellurium belong to?
Metalloid
Who used atomic numbers to help form the modern periodic table?
Henry Mosely
What is electron affinity?
The change in energy when an electron is added to a neutral atom to form an anion
As the atomic numbers of halogens increase, what happens to their densities, melting points, and boiling points?
They increase
Which sublevel block is Uranium found in?
f block
What did John Newlands do?
Grouped the elements by mass, but in bigger groupings that Dobereiner. Used atomic mass. Stated the law of octaves
List the following elements in order of increasing atomic radius and decreasing electronegativity:
Lithium, Magnesium, Phosphorus, Krypton
Krypton, Phosphorus, Lithium, Magnesium
Give properties of chalcogens and elements found in this group.
Properties: six valence electrons, and oxygen is colorless, odorless, and tasteless and reactive
Elements found: oxygen, sulfur, selenium, tellurium, Polonium, and Livermorium
What are generally gases or soft, crumbly solids?
Nonmetals
What did Antoine Lavoisier do?
Presented a list of thirty substances that he declared could not be broken down into simpler substances
Which have bigger atomic radii, cations or anions? Why?
Anions are larger since the extra electrons will repel each other and will be shielded by other electrons
What is the difference between the lanthanoid series and the actinoid series?
Lanthanoid series are found naturally in the earth's crust.
Only five of the actinoid series are found in nature.
What is ionization energy?
The amount of energy required to remove an electron from an atom