4.4 Discuss FOUR precautions a tourist in a malaria-infected country should take in order to prevent malaria. (4)

See elements listed below. For each element, answer the following: Is the element a metal or nonmetal? What is the element’s ionic charge? Will the element donate or accept electrons? State the quantity of electrons that will be donate or accepted. Periodic Table Indium (In) Lead (Pb) Radium (Ra) Rubidium (Rb) Lithium (Li) Krypton (Kr) Arsenic (As) Tin (Sn)

1.2 The blue button below is linked to diagrams that relate to various structures that you have studied. Study these diagrams carefully and answer the questions that follow:      

To establish standing of an agency decision, the challenging party must establish the following: 

Question 8:   This question is about metals.   Magnalium is an alloy of aluminium and magnesium.   The diagram shows how the atoms are arranged in this alloy.     Right Click on the button to open the image in a new tab.       a  State what is meant by the term alloy. (1)   b  Explain why magnalium is harder than aluminium. (2) [3]

Question 2:    Substances can exist as solids, liquids or gases. ai Give the change of state that occurs when a substance is boiled. (1) aii Complete the word equation for the sublimation of iodine. iodine (s) → iodine (……….) (1) b Draw a diagram of circles to show the arrangement of particles in a solid. (1)   c The table lists some statements about particles. Write the letters to show which statements are correct for solid particles. (2) Letter Statement A the particles vibrate B the particles do not move randomly C the particles have no gaps between them D the particles move randomly E the particles have more energy than in water F the particles have a regular arrangement  [5]

Question 1:   This question is about the metal aluminium. ai Draw a labelled diagram to represent the structure and bonding in a metal. (2)    aii Explain why a metal is malleable. (2)     b Aluminium is used to make cans for drinks. Give two properties of aluminium that make it suitable for this use. (2)     c Aluminium is extracted from aluminium oxide (Al2O3) by electrolysis. The electrolyte is aluminium oxide dissolved in molten cryolite.   ci State why aluminium cannot be extracted by heating aluminium oxide with carbon. (1)   cii Aluminium is produced at the negative electrode. The ionic half-equation for the reaction is Al3+  +  3e−  →  Al State why this is a reduction reaction. (1)   ciii  Complete the ionic half-equation for the reaction at the positive electrode. ………….. O2− → ………….. + …………… (2)   [10]

The members of the agency board hear appeals from the decisions of administrative law judges. 

The 14th Amendment restricts actions by state and local governments. 

Which two clauses are contained in the first amendment? (Choose 2)