Question

• N2 • CCl4 • SiO2
• AlCl3 • CaCl2 • LiBr
Which compounds are ionic and which are covalent?

please help

Answer 1

Look up the electronegativity if each and subtract them A difference of 1.8 or so is the 50-50 mark between more ionic or more covalent with more ionic being > 1.8 or so and more covalent being <1.8 or so.
Generally, when a question is stated this way, (that is, it is all ionic or all covalent) you call it all or nothing.
For example; N2.
N is about 3.0. 3.0-3.0- = 0 so this is covalent.
CCl4. C is 2.5; H is 2.1; 2.5-2.1 = 0.4 so covalent. etc

Answer 2

Thank you