Atoms and Periodic Table

How many Neutrons does this isotope have?

Modern periodic tables organize the elements by

What particles are found in the nucleus?

An atom has 11 protons, 11 electrons and 13 neutrons.  What is its mass number?

He said that atoms of any one element are different from those of any other element

Each shell of an atom has a maximum number of ___________ it can hold.

What does the number 32.065 represent?

What atom is this Bohr diagram?

Who discovered that an atom is mostly empty space?

A full valence shell, being stable and nonreactive is a characteristic of what group of atoms?

The first shell of an atom can hold only ______ electrons while the second shell holds _____.

The ________________ number of an element is determined by its number of protons.

The most common isotope of Carbon (atomic mass=12) has ______ neutrons and ______ protons

Lewis Dot diagrams show

The identity of an atom is represented by the _______________.

Is this the most common isotope?

Who developed the first periodic table?

Is this the most common isotope for this element?

Metals are poor conductors of heat and electricity

Is this the most common isotope?

How do you determine the most common isotope?

___________________ are particles of matter that make up protons and neutrons.

What atom is this Bohr diagram?

___________________ are found moving around the nucleus of an atom in a cloud.

Give the group number and period for Zinc.

If you are a gas or a brittle solid and a poor conductor of heat and electricity, you are a

An element that has the same # of _____ but different number of neutrons is called an isotope.

If Sulfur has an atomic number of 16, mass number of 32, what is the # of protons and neutrons?

Fluorine-20 means that this less common isotope has ___ protons and ___ neutrons

The mass of a(n)____________________ is equal to the mass of the proton.

What element has a boiling point below room temperature?

An atom has 11 protons, 11 electrons and 13 neutrons. What is its atomic number?

An atom has 11 protons, 11 electrons and 13 neutrons. What element is it?

Protons and Neutrons both have a mass of _________ amu each.

The noble gases are non-reactive because they all have 

The mass number of an atom is the sum of

If Potassium has 19 protons, mass of 39, what is its atomic number?

How many electrons does this isotope have?

What is the mass of this isotope?

What scientist discovered electrons are negative with his cathode ray tube?