Question

chapter 2.2 contd
molecular compounds
non - metals can share electrons with other non - metal atoms including hydrogen. these compounds are called molecular compounds.
table 2.3 lists some common molecular compounds.
molecular compounds have the following properties:

• they may be solids, liquids, or gases at room temperature.
• they have lower melting and boiling points than ionic compounds.
• they do not conduct electricity when they are melted or dissolved in water, except in the case of certain acids.

1. identify the types of atoms in each compound. then state whether each compound is ionic or molecular. use the periodic table to help you. (you do not have to know the names of these compounds or their properties to do this.)

chemical formula	types (metal or non - metal)	ionic or molecular	chemical formula	types (metal or non - metal)	ionic or molecular
ph₃	p - non - metal, h - non - metal	molecular	ag₃p	ag - metal, p - non - metal	ionic
p₄o₁₀	p - non - metal, o - non - metal	molecular	o₂f₂	o - non - metal, f - non - metal	molecular
nai	na - metal, i - non - metal	ionic	c₈h₁₈	c - non - metal, h - non - metal	molecular

1. what type of elements combine to form ionic compounds?

what type of elements combine to form molecular compounds?

Explanation:

Step1: Recall ionic compound formation

Ionic compounds form when a metal and a non - metal combine. Metals lose electrons to form cations and non - metals gain electrons to form anions, and the electrostatic attraction between them forms the ionic bond.

Step2: Recall molecular compound formation

Molecular compounds form when non - metals combine with other non - metals. Non - metals share electrons to achieve a stable electron configuration, forming covalent bonds.

Answer:

1. Metals and non - metals combine to form ionic compounds.
2. Non - metals combine with other non - metals to form molecular compounds.