CHM1020 Final Exam | Questions and Verified Answers | Latest Update 2024/2025 | Graded A+

CHM1020 Final Exam | Questions and Verified Answers | Latest Update 2024/2025 | Graded A+ A substance that can be broken down into two or more simpler substances by chemical methods is called a(n) - Answer -compound Which diagram(s) best represent(s) only molecules? - Answer -I and II only How many bromide ions can combine with one ion of aluminum to form an ionic compound? - Answer -3 Which is not a pure substance? - Answer -Air Which country is the world's leading producer of rare earth elements? - Answer -China The majority of new smartphones being released have displays that are at least 5 inches in size. What is this size in centimeters? (There are 2.54 cm in one inch.) - Answer -12.7 cm The most numerous of the elements are the - Answer -metals How many protons are in an atom of carbon? - Answer -6 Oxidation and reduction of atoms involves a change in the number of ___________ in the atom. - Answer -electronsThe numbers 1 through 4 are used to identify four different elements on the periodic table. Which element is expected to have 2+ charge when it forms an ion? - Answer -1 Which is not a mixture? - Answer -sodium chloride Which diagram(s) best represent(s) only individual atoms