Chemists know that atoms contain three kinds of particle. Complete the table below by giving their names and properties. The table has columns for the particle name, relative mass, and relative charge.
Define the terms relative atomic mass and isotope.
Use the data in the mass spectrum to calculate the relative atomic mass, $A_r$, of X. Give your answer to two decimal places and identify X.
The element tellurium, Te, reacts with chlorine to make a single solid product with a relative formula mass of 270. The product contains $52.6\%$ chlorine by mass. Calculate the molecular formula of this chloride.
This chloride melts at $224\,^{\circ}\text{C}$ and reacts vigorously with water. State the type of bonding and structure in this chloride and explain your reasoning.
Suggest an equation for the reaction of this chloride with water.
Sodium and silicon also react directly with chlorine to make the chlorides shown. Describe what you would observe during the reaction between sodium and chlorine.
Explain the differences in the melting points of these two chlorides in terms of their structure and bonding. You should refer to the difference between the electronegativities of the elements in your answer.