What are the 4 rules for naming ionic compounds?

Rules for naming simple ionic compounds.

• Name the metal by its elemental name.
• Name the nonmetal by its elemental name and an -ide ending.
• Name metals that can have different oxidation states using roman numerals to indicate positive charge. Example Fe2+ is Iron(II)
• Name polyatomic ions by their names.

How do you find the end of an ionic compound?

Under the older naming method, you use “-ous” and “-ic” endings for transition metals instead of the Roman numerals. Look at the 2 ionic components of the compound. If the metal has a lower numerical charge than the non-metal, then you add the “-ous” ending. If the metal has a higher charge, then add an “-ic” ending.

What are the 4 properties of ionic compounds?

Properties Shared by Ionic Compounds

• They form crystals.
• They have high melting points and high boiling points.
• They have higher enthalpies of fusion and vaporization than molecular compounds.
• They’re hard and brittle.
• They conduct electricity when they are dissolved in water.
• They’re good insulators.

How do you write formulas and names for ionic compounds?

For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion. For example, KCl, an ionic compound that contains K+ and Cl- ions, is named potassium chloride.

How do you name and write ionic compounds?

Ionic compounds are named by stating the cation first, followed by the anion. Positive and negative charges must balance. Some anions have multiple forms and are named accordingly with the use of roman numerals in parentheses. Ternary compounds are composed of three or more elements.

Do all ionic compounds end in IDE?

The suffix -ide is only used if the nonmetal anion is monoatomic (meaning one atom). Notable exceptions to the above rule are the hydroxide ( OH-1 ) and cyanide ( CN1- ) ions as they were assumed to be monoatomic ions when they were first discovered.

What is a dot and cross diagram for an ionic compound?

A dot and cross diagram for an ionic compound shows the number of electrons present in the outer shell of the atoms from which the compound was made. For example, the dot and cross diagram for sodium chloride shows that the outer shell of the sodium (E.C.(Na) = 2, 8, 1) is empty when it has been converted to a sodium ion (E.C.(Na +) = 2, 8).

What is the electron dot diagram of an atom?

There is another model called the electron dot or Lewis diagram. This system represents an atom and its valence electrons. The electron dot diagram uses the symbol of the element to replace the nucleus and inner shell electrons. The electrons in the valence shell are shown as dots placed around the symbol.

What does the dot diagram of NaCl show?

The dot diagram only shows electrons in the atom’s outermost energy level. No electrons are shown since the only electron in the outermost energy level of sodium was transferred to chlorine. In the final dot diagram of NaCl, the dots between the sodium and chlorine are between the atoms.

What do the dots and crosses mean on the periodic table?

Also note the use of dots to indicate the number of electrons that were originally present in the outer shell of the non-metal atom and crosses to indicate the number of electrons that have been transferred from the metal atom (or atoms) to fill the outer shell of the non-metal.