Chemial Bonds And Reactions - Test Review

 An atom that is positive has…

• gained electrons

• lost electrons 

• gained protons

• lost protons

Ions that are composed of more than one element are called __________ ions.

• covalent

• molecular

• polar

• polyatomic

 Atoms are most stable when they have _____ valence electrons.

• 4

• 5

• 6

• 7

• 8

Based on the charges, what formula would describe a compound containing Ca2+ and Cl- ?

• Ca²⁺₂Cl^-₂

• Ca²⁺₂Cl^-₃

• Ca²⁺₃Cl^-₂

• Ca²⁺Cl^-₂

Based on the charges, what formula would describe a compound containing Na⁺ and P^3- ?

• Na⁺₃P^3-₂

• Na⁺₂P^3-

• Na⁺P^3-₂

• Na⁺₃P^3-

Based on the charges, what formula would describe a compound containing Mg²⁺ and S^2- ?

• Mg²⁺S^2- 

• Mg²⁺2S^2- 

• Mg²⁺S^2-2

• Mg2+2S2-3

Is H2O a polyatomic ion?

• True

• False

An atom that has an unequal number of protons and electrons is called a(n)…

• compound

• molecule 

• neutron

• ion

An orderly, three-dimensional arrangement of particles is called a(n)…

• ion

• atom

• crystal

• molecule

In a single bond, how many TOTAL electrons are shared?

• 2

• 4

• 6

• 8