Matter
Anything that has mass and takes up space.
What is matter?
Considered the building block and smallest basic unit of matter?
What is the atom?
Subatomic particle which identifies an Element.
What is a Proton?
This model describes atoms as small, solid spheres that are indivisible, similar to billiard balls.
What is the Billiard Ball Model?
In this modern (current) atomic model, electrons are found in regions of probability around the nucleus, not in fixed paths.
What is the Electron Cloud Model?
This chart organizes all known elements by increasing atomic number and similar properties.
What is the Periodic Table?
Bohr Model: The maximum number of eletrons that can fit in the first (innermost) energy Level of an atom?
This term refers to substances made up of two or more different elements chemically bonded together at a specifc ratio.
What is a compound?
Called the center of an atom.
What is the Nucleus?
These two subatomic particles make-up the atomic mass (Atomic weigh...amu).
What are Protons and Neutrons?
This atomic model describes negatively charged particles embedded in a positively charged sphere, resembling chocolate chips in a cookie, or plum pudding.
What is the Plum Pudding Model (and the Chocolate Chip Cookie Model)?
In this model, the atom is compared to a peach, with a small, dense nucleus at the center, surrounded by a much larger region of eletrons.
What is the Peach Model?
These horizontal rows on the periodic table represent elements with the same number of electron shells.
What are periods?
No more than ________ electrons can fit in the second energy level?
What is 8?
A combination of two or more substances that are not chemically bonded and can be separated.
What are mixtures?
Subatomic Particle with a positive charge.
What is a proton?
This is equal to the atomic number of an atom
What is the number of protons?
This model describes atoms with electrons orbiting the nucleus in specfic energy levels, like layers of an onion.
What is the Bohr Model (Onion Model)?
In this model, electrons are in fixed orbits around the nucleus, unlike in this other model where electrons are found in regions of probability.
What is the difference between the Bohr Model (Onion Model) and the Electron Cloud Model?
Elements in these vertical columns share similar chemical properties because they have the same number of valence electrons.
What are groups or families?
What is the maximum number of electrons that can be placed in the third energy level (following the 2-8-8 Rule)?
What is 8?
This type of change occurs when a substance changes form, but its chemical identity stays the same.
What is a physical change?
Subatomic particle with a negative charge
What is an electron?
In a neutral atom, this is equal to the number of protons.
What is the number of electrons?
This force holds electrons and protons together in an atom.
What is electrostatic attraction?
This theory states that all matter is made up of tiny, indivisible particles that combine in specific ways to form compounds.
What is atomic theory?
This one-or-two-letter abbreviation represents the name of an element.
What is an element symbol?
On the Periodic Table of Elements, this represents the number of electron shells an atom has.
What are Rows (Periods)?
This type of change results in the formation of a new substance with different properties.
What is a chemical change?
This subatomic particle is neutral.
What is a neutron?
The smallest part of a substance that cannot be broken down chemically.
What is an atom?
This is the force that holds protons and neutrons together in the nucleus.
What is the strong nuclear force?
This atomic model suggests that electrons move in regions of probability around the nucleus, not in fixed orbits.
What is the Electron Cloud Model?
This is the full name of a substance that is represented by a unique symbol on the periodic table.
What is an element name?
On the Periodic Table of Elements, this represents elements with the same number of valence electrons and similar chemical properties.
What are Columns (Groups or Families)?
True or False: Protons in an atom's nucleus is called the atomic Number, and it identifies an element.
What is true?