Atomic Structure
Bonding
Periodic Table
Energy Changes
Acids and Alkalis
100
What is the charge of an electron?
-1 (Negative one)
100
Sodium Chloride (table salt) is an example of what type of bonding?
Ionic
100
Name an element in group 7
Fluorine, Chlorine, Bromine, Iodine, etc...
100
A cold pack works after popping and mixing the chemicals together. What type of reaction is used: endothermic or exothermic?
Endothermic
100
What pH should lemon juice have?
pH = <7
200
How many electrons can fit on the second energy levels (shells)?
8 electrons
200
Chlorine gas (Cl2(g)) is an example of what type of bonding
Covalent bonding
200
Is helium a gas, liquid or solid at room temperature?
A gas
200
Combustion reactions are exothermic. Name one example of a combustion reaction.
Burning wood/fossil fuels, hand warmers, self heating cans.
200
Sodium hydroxide has a pH= 14, it is a strong base. Ammonia has a pH= 9. Therefore, ammonia is a ______ base.
Ammonia is a weak base
300
Atoms of the same element, _____ protons and electrons, _______ number of neutrons.
Atoms of the same element, same protons and electrons, different number of neutrons.
300
Zinc and Sodium metal are examples of what type of bonding?
Metallic Bonding
300
Table salt is called Sodium chloride. Sodium is an alkali metal. What group would you find Sodium?
Group 1
300
What is the catalyst on this graph changing?
Activation Energy (EA)
300
Mg(s) + 2HCl(aq) -> MgCl2 (aq) + ___(g) ?
What gas will this metal and acid make when they react?
H2(g), Hydrogen gas
400
How many protons does Nitrogen have? Ignore the decimal points:
Seven
400
Name an element that shouldn't bond with any chemical.
Any noble gas.
Helium, neon, krypton, radon, xenon.
400
Who arranged the periodic table?
A) Marie Curie
B) Neils Bohr
C) James Chadwick
D) Dmitri Mendeleev
D) Dmitri Mendeleev
400
This graph is showing what type of reaction? Exothermic or endothermic?
Exothermic, the products have less energy (lower on the graph) than the reactants.
400
What is the pH of a substance if the universal indicator turns green?
pH = 7 (neutral)
500
What is the name for the atomic model shown below?
+100 points if you know who created it.
The plum pudding model created JJ Thompson
500
Balance this equation:
CH4 + O2 -> H2O + CO2
Methane + Oxygen -> Water + Carbon Dioxide
CH4 + 2O2 -> 2H2O + CO2
Methane + Oxygen -> Water + Carbon Dioxide
500
How are elements ordered on the periodic table (hint: it's not random)
They are ordered by atomic mass (''weight'' of the nucleus)
500
After making a chemical reaction, you see a change in energy of +1000 KJ. Was this reaction endothermic or exothermic?
Endothermic (gained energy)
500
What colour will pH 14 be if you use universal indicator?
Purple