The Periodic Table
Science

Lanthanoids and actinoids in the f-block of the periodic table, they have full outermost orbitals and filled or partially filled 4f and 5f orbitals
Inner transition metal
Lanthanoids and actinoids in the f-block of the periodic table, they have full outermost orbitals and filled or partially filled 4f and 5f orbitals. Inner transition metals are elements in the f-block of the periodic table that have electrons filling their inner f orbitals.

An element that shares properties with metals and nonmetals, like a semiconductor
Metalloid
An element that shares properties with metals and nonmetals, like a semiconductor, is a metalloid. Metalloids are elements that have characteristics of both metals and nonmetals, often used as semiconductors in electronic devices.

States that atoms gain, lose or share electrons to fill their outermost energy shell with 8 valence electrons
Octet rule
States that atoms gain, lose or share electrons to fill their outermost energy shell with 8 valence electrons. Octet rule. The octet rule is a guideline that atoms are most stable when they have eight electrons in their outer shell.

States that the properties of elements are periodic and based on their atomic numbers
Periodic law
States that the properties of elements are periodic and based on their atomic numbers. Periodic law. Periodic law means that elements show repeating patterns of properties when arranged by their atomic numbers.

Elements in groups 1A to 8A of the periodic table, they exhibit a wide range of physical and chemical properties
Representative element
Elements in groups 1A to 8A of the periodic table, they exhibit a wide range of physical and chemical properties. Representative element. Representative elements are the elements in the s and p blocks of the periodic table that display a wide variety of properties and behaviors.

An element in Group 3 to Group 12 of the periodic table, they are all metals
Transition element
An element in Group 3 to Group 12 of the periodic table, they are all metals. Transition element. Transition elements are metals that have the ability to form various oxidation states and often make colorful compounds due to their electron configurations.