Asked by: Velichka Franquet
science chemistry

Why dont you need to specify the number of ions in the compound when you are naming ionic substances?

Last Updated: 29th January, 2020

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When the metal in an ionic compound always forms an ion with the same charge, you need not indicate that charge as part of the compound name. However, some atoms have the ability to form more than one type of ion. This can make naming confusing.

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Also question is, what are the rules for naming an ionic compound?

When naming ionic compounds, we follow the general rules:

  • Identify and name the cation; this is a metal element or polyatomic cation.
  • Identify and name the anion; this is a nonmetal element. Change the suffix to '-ide,' or use the polyatomic anion name.

One may also ask, what are three elements that form only one anion? Positive and Negative Ions: Cations and Anions

Family Element
VIA Oxygen
Sulfur Sulfide anion
VIIA Fluorine
Chlorine Chloride anion

Considering this, is it necessary to memorize the type of ion each element makes?

For the main group elements (excluding the transition elements), is it necessary to memorize the type of ion each element makes or could you predict the ion charge using a periodic table? No, elements in a column all make ions that have the same charge.

What are the structural units that make up ionic compounds and how are they named?

Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. 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.

Related Question Answers

Xoaquin Jostarndt

Professional

What are some examples of ionic compounds?

Ionic bond examples include:
  • LiF - Lithium Fluoride.
  • LiCl - Lithium Chloride.
  • LiBr - Lithium Bromide.
  • LiI - Lithium Iodide.
  • NaF - Sodium Fluoride.
  • NaCl - Sodium Chloride.
  • NaBr - Sodium Bromide.
  • NaI - Sodium Iodide.

Verginia Dineva

Professional

What are the three rules for naming ionic compounds?

The Stock Method of Naming
An ionic compound is named first by its cation and then by its anion. The cation has the same name as its element. For example, K+1 is called the potassium ion, just as K is called the potassium atom. The anion is named by taking the elemental name, removing the ending, and adding “ide.”

Jurgi Musumeci

Professional

What are the two rules for naming compounds?

When you have two different elements, there are usually only two words in the compound name. The first word is the name of the first element. The second word tells you the second element and how many atoms there are in the compound. The second word usually ends in IDE.

Galya Malia

Explainer

What are the rules of naming covalent compounds?

Rules for naming simple covalent compounds:
  • Name the non-metal furthest to the left on the periodic table by its elemental name.
  • Name the other non-metal by its elemental name and an -ide ending.
  • Use the prefixes mono-, di-, tri-. to indicate the number of that element in the molecule.

Pauna Bosmans

Explainer

Do you use prefixes in ionic compounds?

Do not use numerical prefixes such as mono-, di-, tri-, etc. when naming ionic compounds — those are only used in naming covalent molecular compounds.

Bertilda Valenciaga

Explainer

What is an ionic formula?

The overall ionic formula for a compound must be electrically neutral, meaning it has no charge. When writing the formula for the ionic compound, the cation comes first, followed by the anion, both with numeric subscripts to indicate the number of atoms of each.

Maitane Mondarain

Pundit

Is magnesium ion a cation or anion?

Example 2: Finding the name from the chemical formula
We can simply refer to the cation in the ionic compound as magnesium. Phosphorus, Pstart text, P, end text, is a group 15 element and therefore forms 3- anions. Because it is an anion, we add the suffix -ide to its name to get phosphide as the name of the ion.

Odina Sorapura

Pundit

What is an isotope symbol?

The nuclear symbol consists of three parts: the symbol of the element, the atomic number of the element and the mass number of the specific isotope. Here is an example of a nuclear symbol: The element symbol, Li, is that for lithium. The number of protons and neutrons in the nucleus of the atom.

Xianzhong Endolov

Pundit

How is a negative ion formed?

an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons, as a cation (positive ion), which is created by electron loss and is attracted to the cathode in electrolysis, or as an anion (negative ion), which is created by an electron gain and is attracted to the anode.

Asela Careaga

Teacher

Why do elements want to become ions?

Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.

Wiham Casey

Teacher

What overall charge are ionic compounds and why?

What Is the Overall Charge of an Ionic Compound? The overall or net charge of any ionic compound must equal zero. Although ions themselves are either positive (cation) or negative (anion) by definition, the only way they can bond together and form a compound is by seeking an opposite charge.

Jackeline Castet

Teacher

What subatomic particle has a negative charge?

Electrons are subatomic particles that have a negative charge. They orbit the nucleus of the atom.

Rossella Tugwell

Teacher

Which subatomic particles carry a negative charge?

Electron, lightest stable subatomic particle known. It carries a negative charge of 1.602176634 × 1019 coulomb, which is considered the basic unit of electric charge.

Soubiha Peula

Reviewer

How do you find the electrons?

The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules.
  1. The number of protons in the nucleus of the atom is equal to the atomic number (Z).
  2. The number of electrons in a neutral atom is equal to the number of protons.

Paolo Heihs

Reviewer

How do you identify an anion?

Anion Tests and Observations
Dilute nitric acid is first added to remove any interfering ions. Then, an aqueous solution is added to the test sample. Choose an aqueous solution that will form precipitate with the anion in the test sample. If precipitate is formed, we can confirm the identify of the anion.

Rimvydas Hohenegger

Reviewer

Is oxygen a cation or anion?

By itself, oxygen is neutral (does not have a charge). In order to be considered a cation or anion, there must be charge involved. Although it actually depends on whether the anode/cathode is considered positive or negative (both can be either, although the other must be the opposite).

Alvara Liaqat

Supporter

Is Cl A cation or anion?

The metallic elements generally form cations and the non-metal elements typically form anions. For example in NaCl, the cation, Na+, is formed by loss of an electron from the group 1 metal sodium. While the chlorine anion, Cl-, is formed by the gain of an electron by the group 7 non-metal chlorine atom.

Yanela Verdasco

Supporter

Is Selenium a cation or anion?

The nonmetals arsenic (As), tellurium (Te) and selenium (Se) are also named like the transition metals, and can form either cations or anions. Rule 2: anions. The anion name is formed from the name of the element, but “ide” replaces the normal ending in the elements name.

Tasawar Ithier

Supporter

What is the name of Be2SO4?

Naming Ionic Compounds
A B
Zn(OH) Zinc Hydroxide
Be2SO4 Beryllium Sulfate
CrF2 Chromium (II) Fluoride
Al2S3 Aluminum Sulfide