Atomic Structure & Periodic Table Mania

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

Elements that have the same number of valence electrons are found in the same

Group 1 elements are also called ____________.

How many protons does Rb-85 contain?

Valence electrons are located _________.

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

To become a positive ion, an atom must ___________ .

How many total electrons does an oxygen ion (O^-2) contain?

If the atomic number of Carbon is 6, how many protons are in its nucleus?

Carbon-13 and Carbon-14 are examples of _______________ for the carbon element.

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

Elements in group 17 are called ____________.

How many neutrons does Rb-85 contain?

Atoms of the same element that have a different number of neutrons are called ____________.

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

How many electrons does Rb-85 contain?

To become a negative ion, an atom must ____________.

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

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

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

How many total electrons would a ion of magnesium (Mg⁺²) contain?

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

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

Elements in groups 3 - 12 are called ___________.

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