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