Periodic Table
Atomic Structure
Ions
Chemical Reactions
Balancing Equations
100
What 4 elements (full names) are in the molecule below?
Carbon, Nitrogen, Oxygen, Hydrogen
100
Define the term atom.
The smallest particles of an element, which are made up of protons, neutrons, and electrons. They have a neutral charge as the protons equal the number of electrons.
100
Define the term ion.
A positively or negatively charged particle.
100
What are 3 signs of a chemical reaction?
Change in colour, temperature, appearance
Gas being produced
Change in pH
100
H2 + Cl2 -> HCl
H2 + Cl2 -> 2HCl
200
What are 2 ways we refer to the '22' in titanium?
BONUS QUESTION: What is most likely the most abundant isotope of titanium if its relative atomic mass is 47.867?
Atomic number, proton number
48
200
How do we determine, by looking at an atom, what element it is?
By the number of protons.
200
What is a anion?
Negatively charged ion
200
How could we tell that the metals we tested were alkaline? Be as specific as possible
We added universal indicator and compared it to a pH chart. The water was all blue/purple which means it is more alkaline.
200
Mg + O2 -> MgO
2Mg + O2 -> 2MgO
300
Name a Nobel gas.
He, Ne, Ar, Kr, Xe, Rn
300
Draw the electron configuration (Bohr Model) of Silicon.
300
Define the term ionic bond.
The electrostatic attraction between oppositely charge ions.
300
Why do nobel gases rarely react with other elements?
They are stable due to full outer shells of electrons.
300
Fe2O3 + Al -> Fe + Al2O3
Fe2O3 + 2Al -> 2Fe + Al2O3
400
In the periodic table, how do we organise groups atoms with similar properties?
They are in the same vertical column
400
What is the purpose of a neutron?
They help stabilise the nucleus of an atom.
400
What is is meant by the term valence electrons?
The electrons in the outermost energy level of an atom or ion.
400
How do we prevent highly reactive chemicals from mixing with air or water?
Keep it in oil or hexane
400
Al + HCl -> H2 + AlCl3
2Al + 6HCl -> 3H2 + 2AlCl3
500
State an element with 5 valence electrons
Nitrogen, phosphorus, arsenic, antimony, and bismuth
500
What is the relative mass of electrons compared to protons?
BONUS: Why don't we include the mass of electrons when calculating relative atomic mass?
1/2000
Because they are too small and don't make a big difference to the overall mass.
500
Draw the ionic bonding between Calcium and Chlorine (draw as Lewis structures).
500
What do we call a reaction which produces a large amount of heat, or even fire?
Exothermic
500
SO2 + Li2Se -> SSe2 + LiO
SO2 + 2Li2Se -> SSe2 + 2LiO