quiz: first 20 elements, atomic structure, and periodic\nwrite the element name or symbol?\n1. ca\n2…

quiz: first 20 elements, atomic structure, and periodic\nwrite the element name or symbol?\n1. ca\n2. potassium\n3. ar\n4. chlorine\n5. sulfur\n6. phosphorus\n7. si\n8. al\n9. magnesium\n10. na\n11. ne\n12. fluorine\n13. be\n14. helium\n15. c\nfill in blank/short answer\n16. a horizontal row on the periodic table is called a \n17. a vertical column on the periodic table is called a \n18. the electrons in the outermost energy level are called \nelectrons.\n19. the atomic number represents the number of \n20. potassium has 19 protons, 19 neutrons and 19 electrons. what is the\natomic mass of potassium? \n21. magnesium has 12 protons, 22 neutrons, and 12 electrons. what is the\natomic number of magnesium? what is the atomic mass of\nmagnesium? \n22. how many atoms are in h₂so₄? \n23. how many atoms are in 4(nh₄)₂so₄? \n24. draw a bohr model for aluminum (atomic number is 13).

quiz: first 20 elements, atomic structure, and periodic\nwrite the element name or symbol?\n1. ca\n2. potassium\n3. ar\n4. chlorine\n5. sulfur\n6. phosphorus\n7. si\n8. al\n9. magnesium\n10. na\n11. ne\n12. fluorine\n13. be\n14. helium\n15. c\nfill in blank/short answer\n16. a horizontal row on the periodic table is called a \n17. a vertical column on the periodic table is called a \n18. the electrons in the outermost energy level are called \nelectrons.\n19. the atomic number represents the number of \n20. potassium has 19 protons, 19 neutrons and 19 electrons. what is the\natomic mass of potassium? \n21. magnesium has 12 protons, 22 neutrons, and 12 electrons. what is the\natomic number of magnesium? what is the atomic mass of\nmagnesium? \n22. how many atoms are in h₂so₄? \n23. how many atoms are in 4(nh₄)₂so₄? \n24. draw a bohr model for aluminum (atomic number is 13).

Answer

Explanation:

Step1: Recall element names and symbols

  1. Calcium
  2. K
  3. Argon
  4. Cl
  5. S
  6. P
  7. Silicon
  8. Aluminum
  9. Mg
  10. Sodium
  11. Neon
  12. F
  13. Beryllium
  14. He
  15. Carbon

Step2: Answer periodic - table related questions

  1. Period
  2. Group
  3. Valence
  4. Protons

Step3: Calculate atomic mass

  1. Atomic mass = protons + neutrons, so for potassium with 19 protons and 19 neutrons, atomic mass = 19 + 19=38
  2. Atomic number of magnesium is 12 (number of protons), atomic mass = 12 + 22 = 34

Step4: Count atoms in compounds

  1. In (H_2SO_4), there are 2 H + 1 S+4 O = 7 atoms
  2. In (4(NH_4)_2SO_4), first in ((NH_4)_2SO_4): 2 N + 8 H+1 S + 4 O=15 atoms, then for (4(NH_4)_2SO_4), there are (4\times15 = 60) atoms

Step5: Note on drawing Bohr - model

  1. For aluminum (atomic number 13), there are 13 protons in the nucleus. First shell has 2 electrons, second shell has 8 electrons and third shell has 3 electrons. (Since drawing is not possible in this text - based format, the electron - shell distribution is described)

Answer:

  1. Calcium
  2. K
  3. Argon
  4. Cl
  5. S
  6. P
  7. Silicon
  8. Aluminum
  9. Mg
  10. Sodium
  11. Neon
  12. F
  13. Beryllium
  14. He
  15. Carbon
  16. Period
  17. Group
  18. Valence
  19. Protons
  20. 38
  21. 12, 34
  22. 7
  23. 60
  24. Nucleus with 13 protons, first shell 2 electrons, second shell 8 electrons, third shell 3 electrons