History of Periodic Table
Periodic Trends
Locating the elements
Elemental Groups
Electron Configuration
100
Mendeleev predicted that the empty spaces or ? in his periodic table represented _______________
undiscovered elements
100
What is one-half the distance between the nuclei of identical atoms that are bonded together
Atomic Radius or Atomic Radii
100
Rubidium has an electron configuration of [Kr] 5s^1. In what period is Rubidium located?
What is period 5
100
What are the names of the groups that are the most reactive groups in the s-block of the periodic table of elements? (Looking for 2 names)
Alkali Metals, Alkaline Earth Metals
100
What does the term "valence" mean?
Outermost electrons
200
The person whose work led to a periodic table based on increasing atomic number was _________
Who was Henry Mosely
200
What is the term that refers to the energy need to remove an atom's electron?
Ionization Energy
200
In what subshells are the 8 electrons in period 3?
what are s and p (s = 2 electrons, p = 6 electrons)
200
Which group of elements play an important role in living organisms, and are also extremely valuable as strong, structural useful materials AND make up the d-block on the periodic table?
Transition Metals
200
1S^2 is the electron configuration of what element?
Helium
300
How is the periodic table arranged today?
By atomic number.
300
Within a group of elements, as the atomic number increases, what happens to atomic radius?
increases
300
In what period is Lead (Pb) located?
What is period 6
300
The elements boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Ti), belong in which elemental group?
Boron Group
300
What is the electron configuration of Aluminum?
1S^2 2S^2 2P^6 3S^2 3P^1
400
Dmitri Mendeleev noticed that properties of elements repeated at regular intervals when the elements were arranged in order of increasing ______
atomic mass
400
Why does the atomic radius increase with atomic number in a group?
The number of energy levels goes up. More electrons means more electron shells.
400
What is a horizontal row of blocks called on the periodic table?
What is a period
400
What are the radioactive elements with atomic numbers 90 to 103?
Actinides
400
Using the "Noble Gas Shortcut", what is the electron configuration of sodium?
[Ne] 3S^1
500
What term describes the physical and chemical properties of elements as periodic functions of their atomic numbers
What is periodic law
500
Ionization energy ____________ as you go from left to right across a period and ___________ as you go from top to bottom of a family.
Increases, decreases.
500
In what block of the periodic table is Group 15 located?
What is the p block
500
The elements with atomic numbers from 58 to 71
Lanthanides
500
What does the electron configuration of an element reveal about that element?
How the electrons are arranged in an atom / Where the electrons are located / in what levels or shells the electrons are in
M
e
n
u