The Atom
the basic unit of a chemical element
What is an atom?
arranged in order of atomic number
What is the periodic table?
elements names on a periodic table are represented by 1 or 2 letters
What is an elements chemical symbol?
H2O
What is the chemical formula for water?
nitrogen 78%, Oxygen 21%
What is the Earth's atmosphere?
Made Of Protons, Neutrons, & Electrons
What is an Atom?
tool showing all the elements
What is the periodic table?
if an element is represented by more than one letter, the first letter is capitalized while the second one is _______
What is a lower case letter?
CO2
What is the chemical formula for carbon dioxide?
or
What has 1 carbon and 2 oxygen atoms?
Oxygen, Silicon, and Aluminum are the top 3 elements
What is the Earth's crust?
positive charge & found in the nucleus of an atom
What is a proton?
provides information about an elements characteristics
What is a periodic table?
Capital Letter H
What is the chemical symbol for hydrogen?
shows the type of elements and the number of atoms in a single molecule of a substance
What is a chemical formula?
CHNOPS
Oxygen, Carbon, & Hydrogen are the top elements
What are the main elements of living things?
decides the atomic number on the periodic table
What is a proton?
# of protons
What determines an elements atomic number?
The first letter of an elements chemical symbol
What is a capital letter?
H2O is a molecule of water and is also a _________
What is a compound?
Oxygen, Hydrogen, Chlorine, & Sodium
What is the ocean?
makes up everything that has mass
What is an atom?
# protons + # neutrons
What determines an elements atomic mass?
the second letter if present on an elements chemical symbol
What is a lower case letter?
molecules that contain more than one kind of atom/elements
What are compounds?
Most abundant element on Earth
What is oxygen?