Chemical Formulas
Vocabulary
Structure of an atom
Periodic Table
Bohr Models
100
What is the subscript of the chemical formula below?
H2O
2
100
This subatomic particle is found in the nucleus and has a positive charge.
Proton
100
What are the two subatomic particles that make up the nucleus?
Protons and neutrons
100
Find the element located at period 1, group 1.
Hydrogen
100
How many electrons are allowed in the first energy level?
2
200
If no subscript is shown, like the example below, how many Carbon atoms are present?
CO2
1 (invisible one)
200
This subatomic particle is found inside the nucleus and has a negative charge.
Neutron
200
Where are electrons found?
Outside the nucleus, within the energy levels or electron cloud.
200
Find the element with the atomic number of 17.
Chlorine
200
What is the name for the electrons in the very outermost energy level?
Valence Electrons
300
Which number is the coefficient?
3H2O
3
300
Found outside the nucleus, has a negative charge. Also equal to the number of protons.
Electron
300
What do the number of protons and neutrons equal to?
The atomic mass
300
What happens to the atomic mass as you move across the periodic table?
It increases.
300
What do you use to determine the number of electrons needed for a bohr model?
Atomic number or number of protons.
400
How many Oxygen atoms are present?
4CO2
8
400
The rows on the periodic table that read left to right, also equal to the number of energy levels.
Periods
400
What is the atomic number equal to?
Number of protons
400
What group would I find the noble gases?
Group 18
400
What do the number of valence electrons within bohr models tell you about the element?
Its reactivity, whether is reactive or non-reactive
500
How many Hydrogen atoms are present?
3C6H12O6
36
500
The columns on the periodic table that read top to bottom, also equal to the number of valence electrons.
Groups
500
How would you calculate the number of neutrons using the atomic mass and atomic number?
Atomic mass - atomic number (protons) = neutrons
500
What makes the noble gases nonreactive?
Their last energy level is filled with the maximum number of electrons.
500
Why is this incorrect in determining the Bohr model for Boron? 
The number of protons and electrons are not equal, there should only be 5 protons.