Chemistry- Chemical Compounds Test Study Guide
The correct formula for an ionic compound containing Al₃+ and (CO₃)₂- ions is:
(I couldn't find this on google, sorry, Consult somebody smart)
Distinguish between a mono-atomic ion and a polyatomic ion.
-Mono-atomic ion consists of one atom that is ionized -Poly-atomic ions consists of multiple atoms bonded to each other, but they are acting as one ion
How many atoms of each element are represented in the formula Ni(C₂H₃O₂)₄?
1 Nickel 8 Carbon 12 Hydrogen 8 Oxygen
Covalent bonds generally form between which type(s) of elements?
2 nonmetals
How many atoms (in total) are represented in the formula Ni(C2H3O2)4?
29 atoms total
How many electrons does a nitrogen atom gain when it becomes an ion?
3 electrons
How many valence electrons does silicon have?
4 valence electrons
How many electrons does a chloride ion have in total? How many valence electrons does a chloride ion have?
8 valence electrons 18 total electrons
Give the formula for aluminum fluoride (Hint: Is it an ionic or a molecular compound?)
AlF₃
Write the formula for aluminum oxide.
Al₂O₃
List the name and the formula for the acid that will produce the sulfate ion upon dissolving in water.
Ammonium Sulfate (Maybe, I couldn't google this one, so double check))
Why are the noble gases inert (means "not reactive")?
Because they have 8 valence electrons, they are stable
Give an example of a ternary ionic compound (name and formula).
CN⁻ = Cyanide Ion
Give the correct formula for the ionic compound made of Ca2+ and Cl1- ions.
CaCl₂
Name Ca₃N₂.
Calcium Nitride
Name the compound CCl4. (see hint in question 9)
Carbon Tetrachloride
What do the subscripts in chemical formulas represent?
Chemical Species (Ion, molecule, compound)
Give an example of a binary ionic compound (name and formula).
Chloride Cl⁻¹
Name the compound Co(NO₃)₂.
Cobalt (II) Nitrate
What is the metallic ion (symbol, charge, and name!) in the compound CuCl2?
Copper Chloride metallic copper ion
The correct formula for copper(I) bromide is (see hint in question 9):
CuBr
T or F Compared with ionic compounds, molecular (covalent) compounds have a higher melting point.
False
T or F Covalent bonds form when pairs of electrons are shared between non-metal atoms.
False
T or F The electrons involved in the formation of a covalent bond are core electrons.
False
What is the chemical formula for iron(II) phosphide? (see hint in question 9)
Fe₃P₂
Give the family name of group 17.
Halogens
List the names and the formulas for three acids each containing a different halogen.
Hydrochloric Acid HCl Sodium Hydroxide NaOH Sulfuric Acid H₂SO₄
How can you tell if a given formula, for example HNO₃, represents an acid?
If it has a hydrogen at the beginning then it is an acid
What type of bond is found in magnesium chloride?
Ionic Bond
Which type of bond is formed when electrons are completely transferred?
Ionic Bond
Give the formula for potassium nitride (Hint: Is it an ionic or a molecular compound?)
KNO₃
The correct name for MgBr₂ is:
Magnesium Bromide
Name the compound Mg₃(PO₄)₂. (see hint in question 9)
Magnesium Phosphate
Give an example for a molecule (name and formula) that has a nonpolar covalent bond.
Methane CH₄
The formula for magnesium chloride is (see hint in question 9)?
MgCl₂
List the Greek prefixes for the numbers one to ten.
Mono, di, tri, tetra, penta, hexa, hepta, octa, ennea, deca
Give the chemical formula and charge for the nitrate ion:
NO₃⁻
List the six polyatomic ions, names and formulas, and the one molecule, name and formula, that you memorized for chemistry class.
Nitrate ion = NO⁻₃ Hydroxide Ion= OH⁻ Carbonate Ion= CO²⁻₃ Sulfate Ion = SO²⁻₄ Phosphate Ion= PO³⁻₄ Ammonium Ion= NH⁺₄ Ammonia (Is a molecule) = NH₃
Would elements from group 16 and 17 combine to form an ionic compound? Why, or why not?
No, because they are all nonmetals
The elements of the ____________________ family satisfy the octet rule without forming compounds.
Noble gas
What pairs of elements commonly form ionic bonds?
Nonmetals and metals
Name the molecule P4O6. (see hint in question 9)
Phosphorus Trioxide
Name KNO₃.
Potassium Nitrate
How many electrons are shared in a single, in a double, and in a triple bond respectively?
Single bond= 2 electrons shared (1 pair) Double bond=4 electrons shared (2 pairs) Triple bond=6 electrons shared (3 pairs)
Where are valence electrons located?
The outermost shell of an atom
T or F A compound that has the same number of positive and negative charges is said to be electroneutral.
True
T or F The chemical formula for an ionic compound represents the lowest whole number ratio of ions that results in an electrically neutral compound.
True
Would elements from group 1 and group 17 combine to form an ionic compound? Why, or why not?
Yes because group 1 is metal and group 17 is nonmetal, therefore you can form an ionic compound
Would elements from group 14 and group 17 combine to form any kind of compound? If yes, which kind?
Yes, Silicon, Geranium, Tin, and Lead
What is the electrical charge of an anion?
negative
Would elements from group 1 and group 2 combine to form an ionic compound? Why, or why not?
no because they are both metals which cannot form ionic compounds
When naming a transition metal that forms more than one cation, the charge of the transition metal ion is indicated by a ________________ _____________________ .
roman numeral
