ChemExplained Ch 7- Naming Chemicals and Writing Formulas
As many chemicals form different combinations of bonds with the same elements, you should memorize which radical has the ____ ending.
"ate"
Write the correct formula for silver [Ag⁺] carbonate [(CO₃)⁻²]
Ag₂CO₃
Write the correct formula for aluminum [Al⁺³] sulfite [(SO₃)⁻²]
Al₂(SO₃)₃
Write the correct formula for a compound between Al⁺³ and (SO₄)⁻²
Al₂(SO₄)₃
Write the correct formula for the compound calcium [Ca⁺²] sulfate [(SO₄)⁻²]
CaSO₄
Which seven molecules exist naturally as diatomic molecules?
H, N, O, F, Cl, Br, I (Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine)
Write the numbers 1-10 in Roman numerals.
I II III IV V VI VII VIII IX X
List the Greek Prefixes in numerical order.
Mono, Di, Tri, Tetra, Penta, Hexa, Hepta, Octa, Nona, Deca
Write the correct formula for a compound between Na⁺² and S⁻²
NaS
Write the correct formula for a compound between Na⁺ and S⁻²
Na₂S
Write the number 18 in Roman numerals.
XVIII
How are binary compounds named?
full name of first element, root of second element + -ide
How are ternary compounds named?
full name of first element/radical with positive charge + full name of radical
How are binary acids named?
hydro- + root of second element + -ic + acid
Name the binary acid HBr.
hydrobromic acid
Which element is always listed first in an acid's chemical formula?
hydrogen
Name the ternary compound Li₂C₂O₄ (C₂O₄ is a radical).
lithium oxalate
Name the binary compound MgBr₂.
magnesium bromide
Name the ternary acid HNO³
nitric acid
Are there radicals in any binary compounds?
no
Are all compounds ending in -ide binary?
no (some radicals end in -ide, and are used in ternary compounds)
The "ite" radical has ____ ____ oxygen(s) than the "ate" radical.
one less
The "per-ate" radical has ____ ____ oxygen(s) than the "ate" radical.
one more
The Roman numerals in a compound indicate an element's ____ ____.
positive charge/oxidation number (positive)
How are ternary acids named?
root of second element + -ic + acid
Which element (ion) is written first in a chemical formula?
the positive ion
When are parentheses ( ) written in the formula for an ionic compound?
to indicate multiples of a radical (polyatomic ion) greater than one.
The "hypo-ite" radical has ____ ____ oxygen(s) than the "ate" radical.
two less
The positive and negative charges in a chemical formula must add up to equal ____.
zero
