Properties of Matter
An element that conducts heat and electricity well.
What is a metal?
Most electronegative element.
What is fluorine?
Atomic model where the protons and neutrons are located in the nucleus. Electrons revolve around the nucleus in fixed orbits (energy levels).
What is the Bohr Model?
The smallest unit of a pure substance that still has the properties of that substance.
What is an atom?
Name of the three-dimensional region around a nucleus where an electron may be found.
What is an orbital? (electron cloud also accepted)
The amount of matter in an object.
What is mass?
Element with an atomic mass of 72 and an atomic number of 32?
What is germanium?
Discovered that atoms have a dense nucleus with positive charge and are mostly empty space.
Who is Rutherford?
A pure substance that is made of only one kind of atom.
What is an element?
Principle that states that atoms tend to form compounds so that each atom can have eight electrons in its outermost energy level.
What is the octet rule?
Matter exists in these 3 states.
What are solid, liquid and gas?
Identifies the element and is equal to the atomic number.
What is the number of protons?
The charge of an atom when the number of protons equal the number of electrons.
What is a neutral?
The substance formed from the atoms of two or more elements.
What is a compound?
Element with this electronic configuration: 1s2 2s2 2p6 3s2 3p6 4s1.
What is potassium (K)?
Two different ways that matter can change.
What is a physical or chemical change?
Iron (Fe) belongs to this family.
What is transition metals?
Electrons are attracted to these subatomic particles.
What are protons?
Substance that cannot be broken down by a chemical change.
What is an element?
Notation used to represent the number of valence electrons of an atom as dots drawn around the element's symbol.
What is Lewis Dot structure (diagram)?
Radius, volume, mass and length.
What are examples of extensive properties?
A trend that increases down a group and towards the left side of the periodic table.
What is atomic radius?
Conducted the cathode ray tube experiment.
Who is Thompson?
Salt water is an example of this type of mixture.
What is homogeneous mixture?
Energy level that can hold only two electrons.
What is the first energy level?