Chemistry Term 1 - Reaction Rate and Atomic Structure Flashcards
How can you tell a reaction has occurred?
A change in energy; A gas is produced (effervescence); A precipitate forms; A colour change
How can a reaction be sped up or slow down?
Increased or decreased temperature, Higher or lower concentration of solute, More or less surface area, Use of a catalyst
How does temperature change the rate of a reaction?
It changes the speed of the atoms
How does concentration change reaction rate?
It increases the number of atoms that can collide
How does surface are change reaction rate?
More surface area increases a chance of collision.
What is a biological catalyst?
Enzyme
What are the benefits of using a catalyst?
Speed up reactions, lower the temperature, and are reusable
What is group 1 in the periodic table?
Alkali metals
What is group 2 in the periodic table?
Alkaline earth metals
What is between group 2 and 3 in the periodic table?
Transition metals
What is group 7 in the periodic table?
Halogens
What is group 8 in the periodic table?
Noble gases
What sub-atomic particles are located in the nucleus?
Neutrons and protons
Which sub-atomic particle surrounds the atom?
Electrons
What is the charge of a proton?
Positive
