Atoms
What is the negatively charged particle in an atom called?
Electrons
are burning reactions combustion?
yes
What method is used to find out the age of a fossil
Radiometric dating
What is the pH level of an acid
7-0
Who created dynamite?
Alfred Nobel
What did Lord Rutherford discover?
Atoms have empty spaces
What is the fuel used in jet engines?
Kerosene
Who invented the word radioactivity?
Marie Curie
What happen if the pH level of a swimming pool drops below 7.2?
Swimmers will get red and stinging eyes
What are the reactants?
The original substances present in a chemical reaction
What did English scientist Sir J. J. Thomson discover?
Atoms contain a negatively charged particle
Glucose
What is the half-life of iodine-131
8 days
Which substance is produced in all neutralization reactions?
salt
What does the law of conservation of mass state?
Mass cannot be created or destroyed
What did Sir James Chadwick discover?
Atoms contain neutrons
What is a oxidation reaction?
The transfer of electron from a reactant
What is the radioisotope Iron-59 used for?
Measurement of blood flow and volume
What bases are in antacid tablets?
Aluminium hydroxide, magnesium hydroxide and magnesium carbonate
What does the law of constant proportions state?
No matter how it is formed, a compound will always contain the same amount of each element
WHat did Democritus discover?
That small particles called atoms exist and make up everyting
In the reaction of a rocket launching, what is the product?
water
How do radioisotopes used in food preservation stop food from spoiling?
The radiation kills the micro-organisms in food and keeps it from spoiling
Whats the word equation when acid rain eats into buildings and statues and is reaching with calcium carbonate in the marble of limestone?
Calcium carbonate + acid rain = Gypsum + water + carbon dioxide
Who invented nitroglycerine?
Ascanio Sobrero