Ionic and Covalent Bonds

25 terms by MrCram 

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Ion

This is an atom or group of atoms that has an electric charge

Cation

When an atom loses an electron, it loses a negative charge and becomes a _________.

Anion

When an atom gains an electron, it gains a negative charge and becomes a _______.

Ionic Bond

This type of bond is made between a Metal and a Non-metal

Formula Unit

This is a combination of symbols that shows the ratio of elements in a compound. Ex: H2O

subscript

This tells you the # of atoms present for the element and is located to the right of the # in a formula unit. EX: There are 2 atoms of Hydrogen (H) in the formula unit H2O

Cation

For an ionic compound, the name of the ______ ion comes first, followed by the name of the Anion.

Metal

These elements always lose electrons and become Cations

Non-metal

These elements always gain electrons and become Anions

Valence Electrons

The electrons responsible for an atom's chemical behavior are called ______________.

Octet Rule

Atoms want to have 8 electrons in their outer most energy level

a Metal + a Non-metal

What type of elements will always make an Ionic bond?

a Non-metal + a Non-metal

What type of elements will always make a covalent bond?

Covalent Bond

Bond made between at least 2 Non-metal atoms

Diatomic Molecules

The seven elements that naturally have 2 atoms share electrons. These elements are Br, I, N, Cl, H, O, and F

Molecule

a neutral group of atoms joined together by covalent bonds

3

How many electrons does Phosphorus (P) need to have an octet?

2

How many electrons does Oxygen (O) need to have an octet?

1

How many electrons does Iodine (I) need to have an octet?

Dot Structures

Gilbert Lewis invented the method of identifying the # of valence electrons an element can make a bond called __________

Ionic Bond

Cation(s) and Anion(s) combine to cancel out their charges in this type of bond

Covalent Bond

Electrons being shared between at least 2 atoms in this type of bond

Ionic Bond

Electrons being "transfered" between at least 2 atoms in this type of bond

Boron (B)

Which atom does not make a diatomic molecule?
1) Oxygen (O)
2) Nitrogen (N)
3) Boron (B)
4) Bromine (Br)

Group #

An element's __________ will tell you the # of valence electrons it contains

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