The group 0 elements, the noble gases, are all unreactive non-metal gases. They show trends in their physical properties. Their uses depend on their inertness, low density and non-flammability.
Why are group 0 elements inert?
They are gases at room temperature
They have a full outer shell of electrons
They are non-metals
What is a typical physical property of a noble gas?
High melting point
Low boiling point
What is the charge of a metal ion?
Potassium is in group 1. What is the charge of a potassium ion?
Calcium is in group 2. How does a calcium atom change when it forms an ion?
It gains 2 electrons
It loses 2 electrons
It shares 2 electrons
Which of the following atomic structures represent a positive ion?
What happens when sodium and chlorine atoms react to form sodium chloride?
Outer electrons transfer from sodium atoms to chlorine atoms
Outer electrons transfer from chlorine atoms to sodium atoms
Sodium and chlorine atoms share pairs of outer electrons
Why do ionic compounds have high melting points?
The elements they contain have high melting points
Ions in ionic compounds are held together by strong forces of attraction
Ionic compounds are solids
Which of these ionic compounds will conduct electricity?
An ionic compound containing a lot of metal ions
An ionic compound in aqueous solution
An ionic compound in the solid state
Which of these is a limitation of a 3D model of a giant ionic lattice?
The model does not show the forces of attraction between the ions
The model does not show how the layers are arranged
The model does not show the relative numbers of metal and non-metal ions