Table 1 shows the boiling points of four of the noble gases in Group 0 of the periodic table.
Table 1
| Element | Boiling point in °C |
|---|---|
| Helium | –269 |
| Neon | –246 |
| Argon | –186 |
| Krypton | –153 |
Give the number of electrons in the outer shell of an argon atom.
Xenon is the element directly below krypton in Group 0.
Predict the boiling point of xenon and give a reason for your prediction.
The noble gases are unreactive.
Explain why, in terms of the electrons in their atoms.
The diagram shows an outline of the periodic table. The group numbers are shown at the top. Four elements are shown by the letters A, B, C and D. These letters are not the symbols of the elements.
Give the letter of the element that is a noble gas.
Give the letter of the element whose atoms have 7 electrons in the outer shell.
Element D reacts to form ions.
Give the charge on an ion of element D.
Elements A and D are metals. Elements B and C are non-metals.
Use the diagram to describe where non-metals are found in the periodic table.
A teacher demonstrates the reaction of the alkali metals with water.
A small piece of sodium is added to a trough of water containing universal indicator.
Name the gas given off when sodium reacts with water.
Complete the word equation for the reaction of potassium with water.
potassium + water → ____________ + ____________
The universal indicator in the water turns purple during the reaction.
What does this tell you about the solution that is formed?
