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Name: __________ Aim 36: Elements, atoms, compounds and miztures 1. When a mixture of water, sand, and salt is filtered, what passes through the filter paper? A) water, only C) water and salt, only B) water and sand, only D) water, sand, and salt 2. What happens when elements chemically combine? A) B) C) D) All elements retain their original properties. New properties are formed. Only metals retain their original properties. New elements are formed. 3. When two or more different elements unite chemically, they form a A) compound C) metalloid Date: ____________ 11. Undissolved solid particles could best be separated from a solution by A) settling C) stirring B) cooling D) filtering 12. When a teaspoonful of sugar is added to water in a beaker, the sugar dissolves. The resulting mixture is A) a compound C) a suspension B) a solution D) an emulsion 13. Draw two different compounds, one in each box, using the representations for atoms of element Xand element Z given below. B) mixture D) solution b Draw a mixture of these two compounds. 4. Which substance is an example of a compound? A) sulfur B) sugar C) helium D) iron 14. Water is 5. Which is the formula of a compound? A) Ca B) Cl C) N D) HF 6. Which substance can be broken down by a chemical change? A) beryllium C) water A) an element C) a mixture B) a compound D) a solution 15. Explain why: B) boron D) magnesium 7. Which substance can be broken down by a chemical change? A) sodium C) sulfur B) argon D) ammonia 8. What is the name for the compound NH4Cl? A) nitrogen chloride C) ammonium chloride B) nitrogen chlorate D) ammonium chlorate 16. Which material is a mixture? A) water C) methane B) air D) magnesium 17. Explain why: 9. The total number of atoms in one molecule of the compound K3 PO4 is A) 7 B) 8 C) 3 D) 12 10. Which of the following is an example of a solution? A) B) C) D) salt water rocks and sand at a beach iron filings and sulfur powder mixed together a drop of pure water 18. How many atoms of each element are in the compound C6H12O6 ? How many total atoms are there in this compound?