day 1 week 2

#1 1SBS 


19. a. protons- 6 protons, 6 electrons
     b. aluminum- 13 protons, 13 electrons
     c. lead- 82 protons, 82 electrons
     d. chlorine- 17 protons, 17 electrons


20. a. sulfer- not electrically neutral
     b. iron- not electrically neutral
     c. silver- electrically neutral
     d. iodine- not electrically neutral


21. a. anion b. neutral atom c. neutral atom d. cation e. cation  
      
22. a. lack of electrical charge is from losing electrons 
        b. electrical charge is from neither gaining/losing electrons 
        c. electrical charge is from neither gaining/losing electrons 
        d. electrical charge is from gaining  electrons 
        e. electrical charge is from gaining electrons 


23. a. H b. Na+ c. Cl- d. Al+ 


24. a. KI b. CaS c. (Fe)(Br)3 d. (Ba)(OH)2 e. (NH4)3(PO4) f. (Al)3(O2)


#2 Additional question 


1. Testing water helps us because once water is tested we can then identify specific substances in water solutions.