Periodic Table of Elements

These flashcards cover key concepts related to the Periodic Table of Elements including its structure, trends, and properties of elements.

Who developed the current Periodic Table and in what year?

Dmitri Mendeleev developed the current Periodic Table in 1869.

What is a period in the context of the Periodic Table?

A period is a row that runs horizontally across the Periodic Table of Elements.

What do elements in the same period share?

Elements in the same period have the same number of occupied principal energy levels.

What is a group in the context of the Periodic Table?

A group is a column that runs vertically up and down the Periodic Table of Elements.

How does the electron configuration of elements in the same group compare?

Elements in the same group have the same number of valence electrons.

What is the electronegativity of Boron?

The electronegativity of Boron is 2.0.

What does ionization energy refer to?

Ionization energy refers to the energy required to remove an electron from an atom.

What is the melting point of bromine?

The melting point of bromine is 266 K.

What property distinguishes metals from nonmetals?

Metals tend to lose electrons from their valence shell, while nonmetals tend to gain electrons.

What is a characteristic of metalloids?

Metalloids are semiconductors, conducting heat and electricity moderately.

What trend in atomic radius occurs as you move down a group in the Periodic Table?

Atomic radius increases as you go down a group.

What happens to ionic radius when an atom becomes an anion?

The ionic radius of anions is larger than the parent atomic radius.

What happens to ionic radius when an atom becomes a cation?

The ionic radius of cations is smaller than the parent atomic radius.