Transcript Chemical Bonds and Ionic Bonds Formation part 1

Bellringer
• Write the electron configuration, orbital
notation, and electron dot structure for
both Na and Cl:
Na
Electron
Configuration:
Orbital
Notation:
Electron Dot
Structure:
Cl
Chemical Bonds and
Ionic Bonds Formation
Objectives:
AHSGE Reading 4.3 Discern organizational
patterns.
6.1 Predicting ionic and covalent bond types
6.2 Assigning oxidation numbers for individual
atoms of monatomic and polyatomic ions
Complete the Table
Group
Number
1A
2A
3A
4A
5A
6A
7A
8A
# Valence
Electrons
Electron Dot
Diagrams
Oxidation
Numbers
Important Vocabulary Terms
1. Chemical bond: the force that holds 2
atoms together
– May be formed by the attraction b/t a (+)
nucleus and (-) electrons or (+) and (-) ions
2. Cation: a positively charged ion
3. Anion: a negatively charged ion
4. Ionic bond: the electrostatic force that
holds oppositely charged particles
together in an ionic compound
1. Oxides – metal + oxygen
2. Salts
Formation of Ions
• Positive ions are formed when atoms
_________ electrons.
• Which groups would be most likely to
lose (or give up) electrons?
Answer: 1A, 2A, 3A, and sometimes 4A
• How are negative ions formed?
Answer: when atoms gain electrons
• Which groups would be most likely to
gain electrons?
Answers: 5A, 6A, 7A, and sometimes 4A
Oxidation Numbers
• How many electrons would atoms of
elements in each group lose or give up?
– 1A =
– 2A =
– 3A =
– 4A =
Answers: 1, 2, 3, and 4, respectively
Oxidation Numbers(continued)
• If atoms give up the following number of
electrons, what would their charge be:
– 1 electron
– 2 electrons
– 3 electrons
– 4 electrons
Answers: +1, +2, +3, and +4, respectively
Oxidation Numbers(continued)
• How many electrons would atoms of
elements in each group gain?
– 5A =
– 6A =
– 7A =
– 4A =
Answers: 3, 2, 1, and 4, respectively
Oxidation Numbers(continued)
• If atoms gain the following number of
electrons, what would their charge be:
– 1 electron
– 2 electrons
– 3 electrons
– 4 electrons
Answers: -1, -2, -3, and -4, respectively
Oxidation Numbers(continued)
• Why is group 4A listed as gaining 4
electrons OR losing 4 electrons?
• The charge on an ion is called its
oxidation number.
• Knowing this now, go back to your table
at the beginning of your notes and fill in
the oxidation number column.
• What do you think the oxidation number
will be for group 4A?