Periodic Table and Atomic Models

These flashcards cover key concepts related to the Periodic Table, atomic models, and chemical bonding, aiding in the understanding of fundamental chemistry principles.

The Periodic Table contains __ elements.

118

Dmitri Mendeleev is known for creating the __.

Periodic Table of Elements

Elements in the same group on the Periodic Table have the same number of __.

valence electrons

There are __ groups on the Periodic Table.

18

The rows on the Periodic Table are known as __.

periods

Metals are usually __ at room temperature.

solid

Nonmetals are primarily __ at room temperature.

gaseous

Metalloids are characterized as having properties between and .

metals; nonmetals

A pure substance with a definite composition can be classified as either an or a .

element; compound

The basic unit of an element is called an __.

atom

The total number of protons in an atom is referred to as its __.

atomic number

Mass number (Z) is the total number of and in an atom.

protons; neutrons

The arrangement of electrons in an atom is known as __.

electron configuration

The tendency of an atom to attract electrons is known as __.

electronegativity

The __ model describes atoms as having a dense, positively charged nucleus.

nuclear

The __ model depicts electrons in fixed energy levels around a nucleus.

planetary

Valence electrons are found in the __ energy level of an atom.

outermost

Atoms tend to react in order to achieve a full __ shell.

outer

Ionic bonding involves the complete transfer of __ from one atom to another.

valence electron(s)