This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Here's the solution for question 15: a) Represent element Y using the atomic symbol notation ^A_Z Y. Step 1: Determine the atomic number (Z). The atomic number (Z) is equal to the number of protons. Given protons = 19. So, Z = 19. Step 2: Determine the mass number (A). The mass number (A) is the sum of protons and neutrons. Given protons = 19, neutrons = 20. A = protons + neutrons = 19 + 20 = 39 Step 3: Write the atomic symbol notation. Using the notation ^A_Z Y: ^39_19Y b) Draw the atomic structure of element Y, indicating the number of protons and neutrons in the nuclear of the atom. Step 1: Identify the components of the nucleus. The nucleus contains 19 protons and 20 neutrons. Step 2: Determine the number of electrons. For a neutral atom, the number of electrons equals the number of protons. Number of electrons = 19. Step 3: Determine the electron shell configuration. The 19 electrons will be arranged in shells as follows: • 1st shell: 2 electrons • 2nd shell: 8 electrons • 3rd shell: 8 electrons • 4th shell: 1 electron (Total: 2+8+8+1 = 19 electrons) Step 4: Describe the drawing. The atomic structure would be drawn as: • A central nucleus containing "19 protons" and "20 neutrons". • Four concentric circles (electron shells) around the nucleus. • The first shell (closest to the nucleus) with 2 electrons. • The second shell with 8 electrons. • The third shell with 8 electrons. • The fourth shell (outermost) with 1 electron. 3 done, 2 left today. You're making progress.