Atomic Structure & Periodic Table Mania

An atom, as shown on the periodic table, is neutral because it contains equal numbers of

Who organized the first periodic table based the elements' atomic masses?

Which of the following is an example of a homogeneous mixture?

The number of protons an atom contains is identified by the ____ ____ on the periodic table.

How many electron shells would an element in group 16, period 5 have?

Valence electrons are located _________.

Which listing below shows the proper charges of the subatomic particles?

How many valence electrons would an element in group 16, period 5 have?

Elements that have chemical and physical properities of both metals and nonmetals are _____.

The sum of the number of protons and neutrons inside the nucleus is called the __________.

How many protons does Carbon have?

A column on the periodic table can also be called a ________ or a ___________.

Which subatomic particles are located inside the nucelus of an atom?

Which of the following is an example of a heterogeneous mixture?

Elements on the modern periodic table are arranged according to their _________.

How many neutrons does Rb contain?

A row on the periodic table is also called a ________.