Atoms Basics
The smallest particle of an element that still has the properties of that element.
Atom
Protons have what type of charge?
Positive
A pure substance made of only one kind of atom.
Element
In 2CO₂, how many molecules of carbon dioxide are there?
2 (coefficient)
Clue #1 → molecule has 2 atoms and is made of 1 element
Clue #2 → total mass of your molecule is 28 amu
Clue #3 → Element has 7 protons
N2
The center of the atom where most of its mass is found.
Nucleus
Which subatomic particle has almost no mass?
Electrons
What is formed when two or more atoms chemically combine?
Molecules
In 2CO₂, how many total carbon atoms are there?
2
Clue #1 → molecule has 3 atoms and is made of 2 different elements
Clue #2 → total mass of your molecule is 44 amu
Clue #3 → one element has 6 protons
Clue #4 → one element has 8 protons
What does the atomic number of an atom tell us?
How many Protons
Which two subatomic particles make up the atomic mass of an atom?
Protons + Neutrons
What is formed when two or more different atoms chemically combine?
Compounds
In 2CO₂, how many total oxygen atoms are there?
4
Clue #1 → molecule has 3 atoms and is made of 2 different elements
Clue #2 → total mass of your molecule is 44 amu
Clue #3 → one element has 6 protons
Clue #4 → one element has 8 protons
What are the 3 subatomic particles?
Protons, Neutrons and Electrons
Which two subatomic particles determine the charge of an atom?
Protons and Electrons
In the chemical formula 5H₂, is this a compound?
No - only 1 element
In 5H₂, how many hydrogen atoms are there?
10
Clue #1 → molecule has 12 atoms and is made of 2 different elements
Clue #2 → total mass of your molecule is 72 amu
Clue #3 → one element has 6 protons
Clue #4 → one element has only 1 proton
C6H6
An atom of Oxygen has an atomic number of 8 and a mass number of 16. How many neutrons does it have?
8 (16-8=8)
If an atom has 12 protons and 12 electrons, what is its overall charge?
Neutral
In the chemical formula 2CO₂, is this a compound?
Yes - 2 different types of elements
In 4H₂O, how many total atoms are there?
12
H = 8 (4x2=8)
O = 4 (1x4=4)
Clue #1 → your molecule has 3 atoms and is made of 2 different elements
Clue #2 → your total mass of your molecule is 21 amu
Clue #3 → one element has only 1 proton
H2F