Chemical Reactions
What are the two parts of a chemical reaction called?
Reactants and Products
What are the 3 subatomic particles?
Protons, neutrons, and electrons
What defines the element of an atom?
The number of protons
Which model did Thompson use to describe atom structure
The plum pudding
What type of radiation releases 2 protons and 2 neutrons?
Alpha radiation
What does a balanced chemical equation show?
the same number of atoms on both sides of the equation
Where are protons and neutrons located in an atom?
In the nucleus
What is an isotope?
Atoms with the same number of protons but different numbers of neutrons
Who discovered the neutron?
James Chadwick
Which type of decay does not change the atom's mass or charge?
Gamma decay
What does the Law of Conservation of Mass State?
Mass cannot be created or destroyed in a chemcial reaction
What is the charge of an electron, proton and neutron?
Electron = Negative
Neutron = Neutral
Proton = Positive
Which two particles change between isotopes of the same element
Neutrons and mass number (atomic mass)
What was wrong with Rutherford's model of the atom?
It didn't explain the existence of neutrons
In beta decay, what does a neutron turn into
A proton and electron
Balance this equation: Na + Cl2 --> NaCl
2Na + Cl2 --> 2NaCl
How many protons does carbon- 12 have? Atomic number is 6 and Atomic mass is 12
6
Whats the difference between Carbon-12 and Carbon-14?
Carbon-14 has 2 more neutrons
Why was Chadwick's discovery important?
It explained the extra mass in atoms
What happens to the atomic number during alpha decay
If I react Carbon with Oxygen, what do I product? Bonus points for the name and the chemical formula
Carbon Dioxide (CO2)
If an atom has 11 protons and 11 electrons, what is its overall change?
Neutral
Why do isotopes of the same element behave the same chemically?
Because they have the same number of electrons
Describe the major change in the atomic model after Rutherford’s discovery
The atom has a dense, positively charged nucleus
Why do atoms undergo radioactive decay?
To become more stable