Illuminate QUIZ on Molecules. Please do not write on this test, put your answers into illuminate. True or False (bubble A for True and B for False for each of the following statements) 1 point each 1. A or B When atoms of two or more elements combine to form a compound, the properties of the compound are different from the elements from which they are made. True, Sodium is a metal that explodes in water and Chlorine will kill living things, but combine them and you get table salt. When atoms of two or more elements combine to form a compound, the properties of the compound are different from the elements from which they are made. WS- Molecules 2. A or B Molecules are made out of many alternating positive and negative atoms. False, Ionic Bonds are made out of many alternating positive and negative atoms There are two types of compounds. Ionic compounds are made of many alternating positive and negative atoms, called ions (such as Na+ and Cl-), and covalent compounds (molecules) form when the atoms in a compound share electrons. WS- Molecules 3. A or B Another name for a molecular compound is a salt. This was entered as true, but it is false. (I will check your answer and adjust this grade) Ionic solids form repeating subunits called crystal lattices. Another name for an ionic compound is a salt. WS-Molecules 4. A or B While atoms can exist on their own, they typically join (bond) with other atoms.
True, The only atoms that don t bond are those that already have a full outer shell, all other atoms will find other atoms that complement their valence electrons 5. A or B Atoms bond by sharing the charged particles from the nucleus of the atom. False, atoms bond by their valence electrons which are on the outer most shell, not the nucleus Multiple Choice (select the best answer for each question) 1 point each 6. Which of the following is an ion? C, Ions gain or lose electrons so 3 protons and 2 electrons are not balanced because the one electron on the outermost shell was lost B C D A 7. Which of the following would be most likely to form a chemical bond? A, B and C are full, but D has one electron that it can lose to an atom with 7 electrons A B C D 8. Which compound of the following compounds have an ionic bond?
A, Na loses one electron and Cl gains an electron to make 2 ions and an ionic bond A NaCl (Sodium Chloride) C H2O (Water) B Cl2 (Chlorine gas) D Cl2O (Dichlorine Monoxide) Matching (Some elements may match with more than one description) 1 point each Description 9. The one element with one valence electron. E Lithium has 3 electrons total, 2 are on the first level and 1 is on the second level (valence electron) 10. The one element most likely to lose one electron when forming a chemical bond. E Lithium has 3 electrons total, 2 are on the first level and 1 is on the second level (valence electron). This one can be lost 11. The one element that has a full set of valence electrons on the first ring. B Helium has 2 electrons on the 1 st ring so it s full 12. The one element that has a full set of valence electrons on the second ring. D Neon has 10 electrons total, 2 on the first ring and 8 on the second ring which is full 13. The one element most likely to gain an electron during a chemical reaction. A Chlorine has 7 valence electrons so there is room for 1 more 14. Which element will form an ionic compound with Lithium? A Lithium can lose one electron and Chlorine can gain one electron Element A. Chlorine B. Helium C. Carbon D. Neon E. Lithium
15. Which element is most likely to form a covalent compound? C Carbon has 4 valence electrons. It would take too much energy to gain or lose an electron so it will share electrons and make a covalent bond Please turn the paper over and do the other side Look at the periodic table square for Beryllium and answer the following questions Beryllium 4 Be 9.012 9 4 = 5 16. How many protons does Beryllium have? P=E 17. How many neutrons does Beryllium have? 18. How many electrons does Beryllium have? 19. On the Lewis Dot Diagram, how many dots does Beryllium have? a. 2 b. 4 c. 5 d. 9 Be has 4 electrons total, 2 on the first ring and 2 on the second ring Look at the periodic table square for Fluorine and answer the following questions Fluorine 9 F 18.998 18.99 rounds to 19 19 9 = 10 20. How many protons does Fluorine have? P=E 21. How many neutrons does Fluorine have? 22. How many electrons does Fluorine have? 23. On the Lewis Dot Diagram, how many dots does Fluorine have? a. 9 b. 7 c. 18 d. 19
Fluorine has 9 electrons, 2 on the first level and 7 on the second level (valence) Look at the periodic table square for Sodium and answer the following questions Sodium 11 Na 22.990 22.99 rounds to 23 23 11 = 12 24. How many protons does Sodium have? 25. How many neutrons does Sodium have? 26. How many electrons does Sodium have? 27. On the Lewis dot diagram how many dots does Sodium have? a. 11 b. 1 c. 12 d. 23 Sodium has 11 electrons, 2 on the first level, 8 on the second level and 1 on the third level 28. How many electron shells does Sodium have? a. 11 b. 1 c. 2 d. 3 The first level hold 2 and the second level holds 8 2 + 8 = 10. Since we need on more we make a new shell so there are 3 total 29. How many valence electrons does Lithium have? a. 1 b. 3 c. 4 d. 7 Lithium has 2 electrons on the first level and 1 on the second level Lithium 3 Li 6.941 30. On the Lewis dot diagram, how many dots does Lithium have? a. 1 b. 3 c. 4 d. 7 It has 1 valence electron so it has 1 dot