The Atom
This is matter composed of only one type of atom.
What is an element?
This philosopher proposed that atoms are tiny particles that make up matter.
Who is Democritus?
Atomic symbols are typically based on the __________ name of an element.
What is Latin?
If an atom has an equal number of protons, neutrons, and electrons, it is considered to be this.
What is neutral?
The modern periodic table is organized into columns called ___________ and rows called ____________.
What are groups and periods?
What is the smallest part of an element that retains the element's properties?
What is an atom?
This philosopher proposed that matter is uniform throughout and couldn't be made of anything smaller.
Who is Artistotle?
What is a nucleus?
This is an atom of an element that has the same number of protons but a different number of neutrons.
What is an isotope?
This determines an element's chemical properties and is the number of electrons in their outermost energy level.
These are the three subatomic particles. (3 answers)
What are protons, neutrons, and electrons?
This atomic model displays electrons that are spread throughout a positively charged sphere.
What is the Plum Pudding Model?
What is atomic mass unit?
This is an atom with a net electric charge due to the loss or gain of one or more electrons.
What is an ion?
This scientist presented a way of organizing all known elements.
Who is Dmitri Mendeleev?
These are the smallest particles that make up protons and neutrons.
What are quarks?
This atomic model displays a completely charged central nucleus that is surrounded by electrons.
What is the Rutherford Model?
This is the number of protons found in an atom of a specific element.
What is atomic number?
If an atom has a positive charge it is a ___________ and if an atom has a negative charge it is an __________.
These are the 3 types of elements that can be found on the periodic table?
What are metals, nonmetals, and metalloids?
This is the area where electrons can be found.
What is the electron cloud?
This atomic model displays electrons moving around fixed orbits.
What is the Bohr Model?
This is the sum of the protons and neutrons in the nucleus of an atom.
What is the mass number?
Calculate the number of electrons in Cl-.
18 Electrons
8 Neutrons