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