Atoms & Periodic Table

A ___is positively charged.

The rows on a periodic table are called

Alkali Metals are soft and shiny metals found in Group ___

__ elements do not occur naturally on Earth.

How many electrons are in an orbital that is stable?

A ___ is negatively charged.

The electrons found in the outermost orbital are called ____

__ are brittle and non-elastic

If neon's atomic number is 10 and the mass is 20, how many neutrons does it have?

How many electrons fit in the first orbital?

__ make up the majority of the universe.

The atomic __ is the number of protons found in an element.

Elements are arranged in columns called _____

The shell closest to the nucleus has the __ energy.

Electrons orbit the nucleus in specific __ that surround the nucleus.

Elements are presented in the periodic table by order of __ atomic number.

Elements with the same number of __ are placed in the same row.

Elements with the same number of valence electrons are placed in the same ___.

__are metallic elements found in Groups 3-12 and in the rows below the periodic table as well.

Most elements are ___

A/An ___ is a type of atom with the same number of protons.

__ are elements found in Group 18.

__ are nonmetals found in Group 17.

An unstable isotope is called a ___ isotope.

The periodic table displays each ___ in a box.

Alkaline Earth Metals are Group __ elements.

___ are good conductors and usually have a high density and melting point.

What two subatomic particles are found in the nucleus of an atom?

How electrons are arranged in the shells of an atom is called

If Iodine has an atomic number of 53 how many protons does it have?

Atomic number and the neutrons equals ...

Actinides are actually part of period __

__ have characteristics in-between metals and nonmetals.

An __ is an atom with an electric charge. (electrons are different)

The net charge of the nucleus is

__ is a nonmetal even though it is located on the table where most of the metals are found.

If Sulfur has a mass of 32 and has 16 neutrons, how many protons does it have?

All the known elements are organized in a table called

An element is abbreviated with a one or two letter__.

__ are hard, shiny (lustrous), malleable and ductile.

A box on the periodic table usually shows the element name, element symbol, atomic number, and

Lanthanides are actually part of period __

___ are inert (unreactive) substances.

A/An ____ is the basic building block of matter.

An __ is a variety of an element with a different number of neutrons.

__ are poor conductors and usually have a low melting point.