8 - Unit 1, Section 1 - Day 5

Atoms and Elements: A Review

Unit 1, Section 1

Match

Match each vocabulary to its corresponding description.

• Cation

• Anion

• Atom

Positively Charged; Formed By Losing Electrons

Negatively Charged; Formey By Gaining Electrons

Neutral; Equal Number of Protons and Electrons

• Positively Charged; Formed By Losing Electrons

• Negatively Charged; Formey By Gaining Electrons

• Neutral; Equal Number of Protons and Electrons

Multiple Choice

Carbon has _____ valence electrons.

• 3

• 4

• 5

• 6

Multiple Choice

Ionic bonding forms between:

• A metal and a nonmetal.

• Two metals.

• Two nonmetals.

Covalent bonding - a type of bonding in which electrons are shared between two atoms

• It's different from ionic bonding, in which electrons are transferred

Covalent Bonding

• Ions don't form because atoms do not lose or gain electrons

• Covalent bonds form because electrons are shared

Covalent Bonding

• Covalent bonding happens between nonmetal atoms

• It also forms molecules instead of crystals

• Molecules have a definite size and shape instead of continuing in all three dimensions

Molecules, Not Crystals

Multiple Choice

Which of the following compounds use covalent bonding?

• PbCl₂

• LiBr

• C₃H₆O₃

• Ca(OH)₂