Atom
Name the subatomic particles.
Protons, neutrons, electrons
What is half-life?
The time it takes for half of a sample to decay.
True or False.
It is not important to consider safety in experiments.
False.
What is the law of conservation of mass?
It explains that the total weight of reactants and products are equal.
What ions identify acids and bases?
Acids - H+ ions
Bases - OH- ions
What charge do the following have: proton, neutron, electron?
Proton (positive), neutron (neutral), electron (negative).
Name the three main types of nuclear decay.
Alpha, Beta, Gamma.
When completing an experiment, why is it important to make sure measurements are accurate during an experiment.
It can cause inaccurate results, could be harmful, could create a unexpected reaction, etc.
Of radon-222, what does the 222 stand for?
Radons new atomic mass as a radioisotope.
5
If an atom looses or gains an electron ...
It becomes an ion (anion or cation).
What is the difference between an isotope and a radioisotope?
Isotope - when an atom looses or gains neutrons.
Radioisotope - when the loss or gain makes the atom unstable.
True or False.
Alpha particles are equal to Helium atoms.
True.
What is the difference between endothermic and exothermic?
Endothermic - releases heat
Exothermic - absorbs heat
Describe the pH scale.
It displays a number of everyday solutions and compares how acidic and how basic they are. Acidic - 0, neutral - 7, basic - 14.
If an atom looses or gains a proton ...
it becomes a different element.
Quick, say the 13th letter of the alphabet.
M
What is the periodic table symbol for Cadmium?
Cd
Materials: beakers, scale, measuring cylinder, chemicals (copper sulphate, sodium bicarbonate).
Method: measure out equal amounts of chemicals, weigh them separately, combine, record observations, weigh final product, compare start and end weights.
Explain what neutralisation reactions are.
Bases neutralise acids.
Acids + bases -> a salt + water
If an atom looses or gains neutrons ...
it becomes an isotope or radioisotope.
Explain Alpha, Beta and Gamma decay.
Alpha - ejects two protons, two neutrons.
Beta - equal to electrons, small and negative charge.
Gamma - when protons become neutrons.
True or False
Miss Martyr's favourite movie is Atlantis, the lost empire
True
What is the difference between complete and incomplete combustion reactions?
Incomplete - produces carbon monoxide.
Your stomach contains hydrochloric acid. Your stomach has a lining to protect it from the low pH, your oesophagus does not. When you have too much stomach acid, it beings to go up your oesophagus, causing damage. Bases neutralise acids, by taking an antacid, you can neutralise your stomach acid.
What is the identifying factor of an element in atom form?
Number of protons
Finish the sentence.
Radioisotopes go through..... because.....
Unjumble this word: MESHRTCYI
What affect does incomplete combustion reactions have on the environment?
Produces less energy,
Carbon or soot can cause respiratory distress, or coat the leaves of plants and interfere with photosynthesis.
Carbon monoxide can be harmful and even lethal.
True or False
The higher the pH, the more acidic.
False