Part B Complete the sentence indicating the number of protons and electrons in the given ion. Match the numbers in the left column to the appropriate blanks in the sentences on the right. View Available Hint(s) Reset Help 6 The ion O has 7 protons and 8 electrons 9 10 11 16 17 18 Submit Part C What isotope has 14 protons and 15 neutrons? Enter the name of the element followed by a hyphen and the mass number (e.g., uranium- 23 4). View Available Hint(s) Submit -Part D Which element does X represent in the following expression: 2X? Enter the chemical symbol of the element. View Available Hint(s) X is the element symbol