Is Cl2 more chemically active than F2?
Fluorine is more active.
Would you expect the particles in Cl2 gas to diffuse faster or slower than the particles in argon gas?
How do you write a balanced equation for magnesium bromide plus chlorine equals magnesium chloride plus bromine?
The balanced equation would be: MgBr2 + Cl2 ----> MgCl2 + Br2 Note: The equation is already balanced, both Cl and Br are diatomic elements they cannot exist alone as Cl or Br, they must be Cl2 and Br2. Also, this reaction happens because Cl is more active than Br, so it can displace it (halides activity series).
Is the properties of a compound are usually the same as the properties of the elements from which it is made?
No. The properties of a compound are always different from the elements of which they are made. For example: sodium (Na) is a metal that reacts vigorously with water, and chlorine gas (Cl2) is a slightly green toxic gas. However, when they combine chemically, they produce common table salt, sodium chloride (NaCl). 2Na + Cl2 ---> 2NaCl
Two elements can combine to form a compound: Carbon and Hydrogen can form Methane: C + 2H2 -> CH4 More than two elements can combine to form a compound: We have Methane from the first reaction. Add Chlorine to form Chloromethane: CH4 + Cl2 -> CH3Cl +HCl Two [or more] compounds can combine to make new compounds: [Cr(N2H4CO)6]4[Cr(CN)6]3 + KMnO4 + H2SO4 = K2Cr2O7 + MnSO4 + CO2 + KNO3 + K2SO4 + H2O