Chemical Compounds and Ionic Compounds

Question 1

Atoms form compounds so it may acquire a valance energy level like that of the closet noble gas. List 3 ways this can occur:

Answer 1

1. Metallic atoms will give up electrons to other atoms forming cations.
2. Non-metallic atoms will tend to accept electrons from other atoms forming anions.
3. Non-metallic atoms may share electrons with each other.

Question 2

Ionic Compounds-Composed of ____.

Answer 2

Ions.

Question 3

Binary Ionic Compounds are made of __ elements. They form when _____ reacts with a _____. When two elements react, _____ electrons from the metal are ______ to the non-metal. This forms an ____ bond. These bonds are very _____ because they result from strong forces of _____ between _____ charged Ions.

Answer 3

2, metal, non-metal, valence, transferred, ionic, strong, attraction, oppositely.

Question 4

What is a Cystal Lattice? How does it relate to Ionic compounds?

Answer 4

A regular repeating pattern of ions in a n ionic compound.

Question 5

Molecular (covalent) compounds are made up of two or more non-metals that form molecules by _____ electrons.

Answer 5

Sharing.

Question 6

Atoms in molecules are joined by _____ bonds. These bonds are different from _____ bonds. Neither atom wants to give up it’s ______. Therefore there is no electron_______. Instead they _____ valence electrons in a _______ bond.

Answer 6

Covalent, ionic, electrons, transfer, share, covalent.

Question 7

An atom can form enough ______ bonds to complete its _____ energy level.

Answer 7

Covalent, valence.

Question 8

What are compounds made of?

Answer 8

Compounds are made up of atoms chemically bonded together.

Question 9

What are compounds represented by?

Answer 9

Compounds are represented by chemical formulas, which tell us how many and what type of each atom is present in the compound. Chemical formulas make use of chemical symbols and subscript.

Question 10

What does the chemical symbol in a chemical formula represent.

Answer 10

The element.

Question 11

What does the subscript in a chemical formula represent.

Answer 11

The number of atoms.

Question 12

What are ionic compounds?

Answer 12

Compounds, like atoms, are electrically neutral , which means they have no overall charge. With ionic compounds, we are looking at charged species (ions) making up the compound. In order for the compound to be neutral, the charges on each ion must cancel out. This important to keep in mind when writing the chemical formulas for ionic compounds.

Question 13

What is a binary ionic compound?

Answer 13

Binary ionic compounds are composed of 2 different ions. They are always a bond between a cation and an anion.

Question 14

How to write formulas for ionic compounds.

Answer 14

1. Write the symbols, with the metal first.
2. Write the ionic charge above each symbol to indicate the stable ion that each element forms.
3. Determine how many ions of each type you need so that the total ionic charge is zero.
4. Write the formula using subscripts to indicated the number of each type of ion (1 as a subscript is not written).

Question 15

What are the properties/characteristics of an ionic compound?

Answer 15

• A complete transfer of electrons to form ions.
• Ionic bonds(attractions of opposite charges).
• From crystal lattices.
• Usually solid at room temperature.
• Will conduct electricity in in solution or liquefied (electrolytes).
• High melting and boiling point.
• Hard and brittle.
• No prefixes when naming, have to balance charge.

Question 16

Which types of elements combine to form binary ionic compounds?

Answer 16

Metals and non-metals form binary ionic compounds.

Question 17

Which types of elements combine to form binary molecular compounds?

Answer 17

Two non-metals form binary molecular compounds by sharing elements.