Lesson 2 - Period and Group Designations of the Periodic Table
An ________ is any one of a series of radioactive f-block elements with atomic numbers 90-103.
Actinide
________ is another name for the s-block elements in Group 1 of the PTE.
Alkali metals
________ is another name for the s-block elements in Group 2 of the PTE.
Alkaline-earth metals
The real basis of periodicity of elements is the election ________ of their atoms.
Configuration
The ability of a substance to be drawn, pulled, stretched, or extruded into a wire.
Ductility
Which properties are characteristics of ALL metals?
Good conductors of electricity and heat Luster
________ are p-block elements with electrons in p^5 orbitals and are located in Group 17 of the PTE.
Halogens
A ________ is any one of a series of metallic f-block elements with atomic numbers 58-71.
Lanthanide
The name of the ability of a substance to shine by reflecting light.
Luster
The ability of a substance to be hammered, shaped, or beaten into thin sheets.
Malleability
An element that is not as malleable as a metal but not as brittle as a nonmetal, and which will conduct electricity under certain conditions is a ________.
Metalloid
________ are very stable elements with electrons in p^6 orbitals and located in Group 18 of the PTE.
Noble gases
A full s and p sublevel (eight electrons) that completes the outer electron shell of an atom and makes the element very stable and chemically nonreactive.
Octet
[Ne]3s^2 3p^2
P-3, G-14, p
[Ar]4s^1
P-4, G-1, s
[Ar]4s^2 3d^10 4p^6
P-4, G-18, p
[Ar]4s^2
P-4, G-2, s
[Kr]5s^2 4d^10 5p^5
P-5, G-17, p
[Xe]2s^2 4f^14 5d^4
P-6, G-6, d
[Rn]7s^2 5f^6
P-7, no group, f
Which of the following is NOT determined by the valence electrons of an atom of a particular element?
Physical properties
________ is another name for the d-block elements in Group 3-12 of the PTE.
Transition metals
Electrons that occupy the highest energy level of an atom of a particular element are called ________ electrons.
Valence
Electrons that occupy the highest energy level of an atom of a particular element and determine its chemical properties.
Valence electrons
Period 4, Group 18, p-block [Ar]
[Ar]4s^2 3d^10 4p^6
Period 2, Group 13, p-block [He]
[He]2s^2 2p^1
Period 5, Group 2, s-block [Kr]
[Kr]5s^2
Period 3, Group 17, p-block [Ne]
[Ne]3s^2 3p^5
Period 6, Group 9, d-block [Xe]
[Xe]6s^2 4f^14 5d^7
