For question #17, use the following picture:

17. what element is this? how do you know? (page 495 and periodic table pages 500-501)

for questions 18-21, use the information on pages 590-592 and page 567. in each space, classify the reaction type.
18. 2libr + pb(no3) pbbr2 + 2lino3
19. fe + 2hcl fecl2 + h2
¬¬¬20. cao + h2o ca(oh)2
21. nicl2 ni + cl2
for questions 22 – 24, write an equation for the reaction of hydrogen chloride and sodium sulfide to produce hydrogen sulfide with sodium chloride. (page 582 and page 567-568)
22. show the formulas of the reactants.

23. show the formulas of the products.

24. write the balanced the equation for this reaction. (page 585-587)

25. what is the order of the types of nuclear radiation from lowest to highest energy? (pages 621-622)

26. which statement is false? rewrite it so that it is true. (pages 624-625)
a. fusion involves the combination of two smaller atoms into a larger atom.
b. fission involves the splitting of an atom into smaller atoms.
c. fission and fusion are two processes that release very little amounts of energy.

27. magnesium bromide is a binary ionic compound. from its formula, mgbr2, how do you know that mg is the metal? (pages 567-568)

28. element x has five valence electrons, element y has one valence electron, and element z has one valence electron. which two of these elements are most likely to have similar properties? explain your answer. (page 503)

fill in the blank: type your answer in the blank, or in the space below the question. do not use the internet –use only the textbook and refer to the suggested page numbers provided to complete the statements.
29. in dalton’s atomic theory, he stated the different atoms combine in simple ratios to form compounds and atoms of a specific element are from those of another element. (page 491)
30. at sea level, water at 100°c. (page 436)
31. the theory of matter states that all particles of matter are in constant motion. (page 432)