Development of the Periodic Table

A set of flashcards covering key vocabulary and concepts related to the development and structure of the periodic table.

Periodic Table

A table where elements are arranged according to their atomic number and grouped by similar properties.

Periodic Law

The physical and chemical properties of the elements are periodic functions of their atomic numbers.

Mendeleev

The creator of the periodic table who grouped elements with similar properties together.

p-block Elements

Elements in Groups 13-18 of the periodic table, excluding helium.

s-block Elements

Elements in Groups 1 and 2 of the periodic table.

Alkali Metals

Group 1 elements, including lithium, sodium, and potassium, known for their reactivity.

Alkaline-Earth Metals

Group 2 elements, such as beryllium and magnesium, which are less reactive than alkali metals.

Atomic Number

The number of protons in the nucleus of an atom that defines the element.

Electron Sublevel

The division of electron shells where electrons are likely to be found.

Groups and Periods

Vertical columns in the periodic table representing elements with similar properties (groups) and horizontal rows (periods) representing the energy levels of electrons.

Noble gases (g 18)

most unreactive of all nonmetals and include helium, neon argon, krypton, xenon, and radon

halogens group 17

they are the most reactive nonmetals and include fluoride, chlorine, bromine, iodine, and astatine

The P Block

At its right hand end P block include includes all nonmetals, except hydrogen and helium. All six metalloids are in the P block and at the left-hand side and bottom there are eight p block metals