Elements
Molecules
Experimental Design
Chemical Reactions
100
What is the chemical symbol for Hydrogen?
H or capital H
100
How many different elements are in H2O?
2. Hydrogen and Oxygen
100
What is the Independent Variable in an experiment?
The variable the scientist changes on purpose.
100
What must happen to molecules before a chemical reaction can happen?
Collision
200
O is the chemical symbol for what element?
Oxygen
200
Why does H2O2 behave differently from H2O?
The addition of an extra oxygen changes the properties of the molecule.
200
What is the Dependent Variable in an experiment?
What the scientist measures / collects data on.
200
What is a catalyst?
Something that changes the activation energy of a reaction.
300
Na is the chemical symbol for what element?
Sodium
300
How many carbon atoms are in CO2?
One
300
How many variables is a scientist allowed to change in any experiment?
One
300
What is activation energy?
The energy required for a reaction to take place
400
What is the chemical symbol for Chlorine?
Cl
400
How many different elements are in a molecule of COH3?
Three
400
Are initial hypotheses always correct?
No
400
How does temperature influence the speed of molecules?
The higher the temperature, the faster the molecules move.
500
Fe is the chemical symbol for what element?
Iron
500
How many total atoms are represented?
3 H2O2
12
500
Who is the dumbest person in this picture?
They are all stupid and will probably die later today.
500
Do all collisions result in a chemical reaction?
No