# Part b determine the number of neutrons in each of

• Homework Help
• Dezzhoo
• 18
• 90% (30) 27 out of 30 people found this document helpful

This preview shows page 12 - 14 out of 18 pages.

Part B Determine the number of neutrons in each of the following atoms given the mass number and atomic number. Match the numbers in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Hint 1. How to approach the problem Start by identifying the mass number and atomic number for each atom. Then, use the atomic number to find the number of protons. Once you know the number of protons in the atom, you can apply the equation mass number = number of protons + number of neutrons to find the number of neutrons in each atom. Hint 2. Determine the number of protons in an atom How many protons are in an atom of aluminum with a mass number of 24 and an atomic number of 13? Express your answer as an integer. Help Reset Help Reset atomic mass atomic number element symbol mass number Be B F Co Pr Cn 4 5 9 27 59 112
protons in aluminum = 13
Hint 3. Rearrange the equation to solve for neutrons Which of the following properly rearranges the equation mass number = number of protons + number of neutrons to find the number of neutrons in an atom? ANSWER: Correct Part C Using the periodic table and some characteristics of an atom, you can determine the composition of subatomic particles in a neutral atom. Complete the chart, indicating the element symbol and the number of protons, neutrons, and electrons in each atom. Drag the appropriate labels to their respective targets. Hint 1. Determine the number of protons based on the element symbol The element symbol is used to identify an element. Most periodic tables display the one- or two-character element symbol prominently within each cell. The atomic number, which is the number of protons in each atom of that element, is most often displayed either above or to the upper left of the element symbol. How many protons are in an atom of iron, Fe? Express your answer as an integer. ANSWER: Hint 2. Determine the element symbol from the number of protons What element has 18 protons in the nucleus? Express your answer as an element symbol. Help Reset 9 10 11 13 15 16 17 19 20 24 31 1. An atom of aluminum with a mass number of 24 and an atomic number of 13 has a total of 11 neutrons. 2. An atom of phosphorous with a mass number of 31 and an atomic number of 15 has a total of 16 neutrons. 3. An atom of potassium with a mass number of 39 and an atomic number of 19 has a total of 20 neutrons. 4. An atom of fluorine with a mass number of 19 and an atomic number of 9 has a total of 10 neutrons. 5. An atom of oxygen with a mass number of 17 and an atomic number of 8 has a total of 9 neutrons.