Bond, Covalent Bond
Covalent bonds form between___________ and ___________.
non-metal and a non-metal
Name an element with an ion charge of -3.
N, P, As, Sb, Bi
Write the formula for: calcium nitride
Ca3N2
Name this compound:
CCl4
Carbon tetrachloride
What is one property of a metallic bond?
High melting and boiling point
Conducts electricity
An acid is a compound made of nonmetals that always includes what element?
Metals losing an electron form a ________, while non-metals gaining an electron form a __________.
cation, anion
Write the formula for: Sodium Acetate
NaC2H3O2
Name this compound: Na2O
Sodium oxide
How would you describe the electrons in a covalent bond?
Shared between atoms
What is a key characteristic of covalent compound names?
Prefixes
Which 2 elements are exceptions to the octet rule?
H and He
Write the formula for: diantimony hexasulfide
Sb2S6
Name this compound: CaCO3
Calcium carbonate
What does a Roman numeral tell us about a transition metal?
Charge
Name 2 properties of covalent compounds.
- Nonmetals only
- Poor conductors
- Low melting point
- Flammable
What holds together the ions in an ionic bond?
Attraction between positive and negative forces
Write the formula for: strontium hydroxide
Sr(OH)2
Name this compound: P5Se7
Pentaphosphorus heptaselenide
Describe the movement of electrons in a metallic bond.
Electrons flow freely between ions
Electrons are delocalized
What is one property that differs between polar and nonpolar covalent compounds?
Solubility (polar dissolves, nonpolar does not)
Ionic compounds are generally soluble in water. Name one other physical property.
High melting & boiling points
Solid at room temperature
Conduct electricity in water
Write the formula for: Iron (II) sulfate
FeSO4
Name this compound: Hg(NO3)2
Mercury (II) Nitrate
Name one group on the periodic table that does not form ions and explain why.
Group 14 (covalent bonds only)
Group 18 (already have a full valence shell)