Test 1- weak points of LO 1-7 Flashcards
What is a catalyst
Catalyst speeds up a chemical reaction but they remain unchanged
What are enzymes
Enzymes are biological catalysts for example yeast
What is the formula for rate calculations
Rate= change in quantity
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Change in time
Answer in:
Cm3s-1What is everything in the world made up of
Atoms
What does it mean if elements are in the same group/column
Means these elements have similar chemical properties/react in the same way
What is a row called in the periodic table
A row is called a period
What is group 1 of the periodic table
Alkali metals
Name three things about alkali metals
They are all stored under oil
there are less dense than water
They are very reactive and produce an alkali solution
What is group 8 of the periodic table
Noble gases
What is the what in the middle of the periodic table
Transition metals
What is group 7 of the periodic table
Halogens
What is the unit of measurement used to calculate the mass of particles
AMU or atomic mass unit
What is the mass of protons neutrons and electrons in that order
1,1 and zero
What are isotopes
Isotopes have the same atomic number but different mass number they have a different number of neutrons
What is relative atomic mass
Most elements exist as isotopes an average of the license can be calculated this is relative atomic mass
