The Atom
This is the center of an atom.
What is the nucleus?
This Greek coined the word atom in 400 BCE.
Who is Democritus?
Considered the smallest particle that contains mass is the _______.
What is the atom?
There are _____ elements in the periodic table. (How many)
What is 118?
The elements are separated into 3 primary groupings. What are they?
What is metals, metalloids and nonmetals?
Electrons are located in the ________.
What is the electron cloud?
This man developed a 2D model which allows us to visualize electrons.
Who is Niels Bohr?
This is the center of the atom and contains both positive and neutral subatomic particles.
What is the nucleus?
How are the elements grouped in the periodic table?
The placement of elements on the periodic table is base on how many _______ have and are indicated by the _______ number.
What is protons and atomic?
Neutrons have a _________ charge.
What is a neutral charge or zero charge?
This man is known as the "Father of Modern Atomic Theory" and is noted for conducting the first experiments on atoms.
Who is John Dalton?
For approximately 20 years it was thought that electrons followed a straight and consistent path within electron shells. Today, it is believed they move freely with in this structure. What is it called?
What is the Electron Cloud?
Why is the chemical symbol for silver Ag, lead Pb and copper Cu?
What is they are based on their Latin names?
This element is the most dangerous of the entire periodic table.
What is Astatine (At)?
The approximate size of an atom is _________nm.
What is 2 X 10-9 m?
This man discovered the positive charged particle with in the nucleus and has an element named after him.
Who is Earnest Rutherford?
On the Periodic Table, this indicates the number of protons the element possesses.
What is the Atomic Number?
The horizonal rows are called _______ and have the similar _______ properties.
What is periods and physical properties?
Is calcium (Ca) a metal, metalloid, or nonmetal?
What is a metal?
What is the mathematical symbol associated in the measurement of mass in subatomic particles and, what is the name of that measurement?
What is (u) and it stands for unified atomic mass?
In what year did J.J. Thomason discover the negatively charge subatomic particles that surround the nucleus?
What is 1897?
How is the Atomic Mass calculated?
What is the combination of the total number of protons + the total number of neutrons?
There are ___ vertical columns called _______ and are organized based on _________ properties.
What is 18, groups, and chemical?
The average atomic mass is calculated by __________.