Periodic Table
What is on the right side of the periodic table and makes up most of the table?
metals
What is an example of an element?
hydrogen
Who made the first atomic model?
Democritus
What are the subatomic particles in an atom?
Protons, neutrons, and electrons
What is a fluid?
any substance that can flow and take the shape of the container that holds it
What is the number that is in the top right corner of the element square and what determines this number?
The atomic is determined by the number of protons in its nucleus.
What is an atomic number?
the number of protons in an element
Who made the Fig Pudding Atomic Model?
J. J. Thompson
What is an atom?
Smallest form of an element that still represents that element.
What are the variables of Pascal's principle?
P = f x a
True or False?
All metals are solid.
If false, what metals are liquid or gas?
False
Mercury is a liquid metal.
Name a group of elements on the Periodic Table.
18 different groups
Who had an atomic model similar to Democritus?
Dalton
What determines the atomic number?
the number of protons
What is buoyant force?
an upward force applied by a fluid on an object in the fluid
Which side and group of the period table are the noble gases?
left side - group 18
What are the liquid elements on the Periodic Table?
Mercury and Gallium
Where does the electron go if it gains more energy?
into a layer of the electron cloud closer to the nucleus
What is average atomic mass?
Sum of the protons and neutrons
Give an example of Pascal's principle?
squeezing a closed ketchup bottle
Metals
Metalloids
Nonmetals
Halogens
Noble Gases
Transition Elements
Name three properties of transition elements.
high density
greater strength
a high melting point
How did the atomic model change?
First it was a small solid object that is uncuttable. Negative and positive charges. Electrons move around nucleus. Nucleus is made of protons and neutrons.
J. J. Thompson
What does Archimedes' Principle state about buoyant force?
The buoyant force on an object equals the weight of the fluid the object displaces.