Periodic Table Worksheet II - True/False questions on element properties and trends.
A worksheet titled "CHEMISTRY PERIODIC TABLE WORKSHEET II" with 21 true/false questions about periodic table properties and elements.
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Step-by-step solution for: CHEMISTRY PERIODIC TABLE WORKSHEET II - Comcast.net
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Show Answer Key & Explanations
Step-by-step solution for: CHEMISTRY PERIODIC TABLE WORKSHEET II - Comcast.net
Let’s go through each True/False question one by one. I’ll explain the reasoning simply, then give you the final answers at the end.
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1. Properties of the elements are periodic functions of their atomic numbers.
→ This is the modern definition of the Periodic Law. It’s TRUE. (Mendeleev used atomic mass, but now we use atomic number.)
2. There are more nonmetallic elements than metallic elements.
→ Actually, most elements on the periodic table are metals. Nonmetals are fewer — mostly on the right side and top. So this is FALSE.
3. Metallic properties of the elements increase from left to right across a period.
→ No! Metallic character decreases left to right. Metals are on the left; nonmetals on the right. So FALSE.
4. Metallic properties of the elements increase from top to bottom in a family of elements.
→ Yes! As you go down a group, atoms get bigger, lose electrons easier → more metallic. TRUE.
5. Calcium is a member of the alkaline earth family.
→ Alkaline earth metals = Group 2. Calcium is in Group 2. TRUE.
6. Iron belongs to the alkali metal family.
→ Alkali metals = Group 1 (like Na, K). Iron is a transition metal. FALSE.
7. Bromine belongs to the halogen family.
→ Halogens = Group 17. Bromine is in Group 17. TRUE.
8. Neon is a noble gas.
→ Noble gases = Group 18. Neon is there. TRUE.
9. Group A elements do not contain partially filled “d” or “f” orbitals.
→ Group A = main group elements (s and p blocks). They don’t have d or f electrons being filled in their valence shell. TRUE.
10. An atom of oxygen has a larger volume than an atom of lithium.
→ Lithium is on the far left, Period 2. Oxygen is further right in same period. Atoms get smaller left to right. So oxygen is SMALLER. FALSE.
11. An atom of sulfur is larger than an atom of oxygen.
→ Sulfur is below oxygen in Group 16. Going down a group, atoms get bigger. So sulfur is larger. TRUE.
12. An atom of aluminum (Group 13) has five (5) electrons in its outer shell.
→ Aluminum electron config: [Ne] 3s² 3p¹ → that’s 3 valence electrons (not 5). FALSE.
13. Uranium is a transition element.
→ Transition elements are d-block (Groups 3-12). Uranium is an actinide (f-block). Sometimes people loosely call it transition, but strictly speaking, no. In many curricula, actinides/lanthanides are NOT considered transition metals. So FALSE.
14. The element with the ECN 1s²2s²2p⁵ belongs to Group 15.
→ Total electrons = 2+2+5 = 9 → Fluorine. Fluorine is Group 17. FALSE.
15. The element with the ECN 1s²2s²2p⁶3s²3p¹ belongs to Group 13.
→ Total electrons = 2+2+6+2+1 = 13 → Aluminum. Aluminum is Group 13. TRUE.
16. A chemical family consists of one of the horizontal rows on the periodic table.
→ Horizontal rows = periods. Families = vertical columns (groups). So FALSE.
17. Elements within a family will have similar electron structures and will show some similarities in their chemical properties.
→ Yes! Same group = same valence electron config → similar chemistry. TRUE.
18. Group A elements are known as the representative elements.
→ Yes! Representative elements = Groups 1,2,13-18 (main group). TRUE.
19. Going from left to right in any period, the representative elements show an increasing number of s and p electrons.
→ Yes! Each step adds one electron to s or p subshell. TRUE.
20. The potassium ion is smaller than the potassium atom.
→ Potassium atom loses 1 electron to become K⁺. Losing electron removes outer shell → ion is smaller. TRUE.
21. The bromide ion is smaller than the bromine atom.
→ Bromine gains 1 electron to become Br⁻. Adding electron increases repulsion → ion is LARGER. So FALSE.
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Final Answer:
1. T
2. F
3. F
4. T
5. T
6. F
7. T
8. T
9. T
10. F
11. T
12. F
13. F
14. F
15. T
16. F
17. T
18. T
19. T
20. T
21. F
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1. Properties of the elements are periodic functions of their atomic numbers.
→ This is the modern definition of the Periodic Law. It’s TRUE. (Mendeleev used atomic mass, but now we use atomic number.)
2. There are more nonmetallic elements than metallic elements.
→ Actually, most elements on the periodic table are metals. Nonmetals are fewer — mostly on the right side and top. So this is FALSE.
3. Metallic properties of the elements increase from left to right across a period.
→ No! Metallic character decreases left to right. Metals are on the left; nonmetals on the right. So FALSE.
4. Metallic properties of the elements increase from top to bottom in a family of elements.
→ Yes! As you go down a group, atoms get bigger, lose electrons easier → more metallic. TRUE.
5. Calcium is a member of the alkaline earth family.
→ Alkaline earth metals = Group 2. Calcium is in Group 2. TRUE.
6. Iron belongs to the alkali metal family.
→ Alkali metals = Group 1 (like Na, K). Iron is a transition metal. FALSE.
7. Bromine belongs to the halogen family.
→ Halogens = Group 17. Bromine is in Group 17. TRUE.
8. Neon is a noble gas.
→ Noble gases = Group 18. Neon is there. TRUE.
9. Group A elements do not contain partially filled “d” or “f” orbitals.
→ Group A = main group elements (s and p blocks). They don’t have d or f electrons being filled in their valence shell. TRUE.
10. An atom of oxygen has a larger volume than an atom of lithium.
→ Lithium is on the far left, Period 2. Oxygen is further right in same period. Atoms get smaller left to right. So oxygen is SMALLER. FALSE.
11. An atom of sulfur is larger than an atom of oxygen.
→ Sulfur is below oxygen in Group 16. Going down a group, atoms get bigger. So sulfur is larger. TRUE.
12. An atom of aluminum (Group 13) has five (5) electrons in its outer shell.
→ Aluminum electron config: [Ne] 3s² 3p¹ → that’s 3 valence electrons (not 5). FALSE.
13. Uranium is a transition element.
→ Transition elements are d-block (Groups 3-12). Uranium is an actinide (f-block). Sometimes people loosely call it transition, but strictly speaking, no. In many curricula, actinides/lanthanides are NOT considered transition metals. So FALSE.
14. The element with the ECN 1s²2s²2p⁵ belongs to Group 15.
→ Total electrons = 2+2+5 = 9 → Fluorine. Fluorine is Group 17. FALSE.
15. The element with the ECN 1s²2s²2p⁶3s²3p¹ belongs to Group 13.
→ Total electrons = 2+2+6+2+1 = 13 → Aluminum. Aluminum is Group 13. TRUE.
16. A chemical family consists of one of the horizontal rows on the periodic table.
→ Horizontal rows = periods. Families = vertical columns (groups). So FALSE.
17. Elements within a family will have similar electron structures and will show some similarities in their chemical properties.
→ Yes! Same group = same valence electron config → similar chemistry. TRUE.
18. Group A elements are known as the representative elements.
→ Yes! Representative elements = Groups 1,2,13-18 (main group). TRUE.
19. Going from left to right in any period, the representative elements show an increasing number of s and p electrons.
→ Yes! Each step adds one electron to s or p subshell. TRUE.
20. The potassium ion is smaller than the potassium atom.
→ Potassium atom loses 1 electron to become K⁺. Losing electron removes outer shell → ion is smaller. TRUE.
21. The bromide ion is smaller than the bromine atom.
→ Bromine gains 1 electron to become Br⁻. Adding electron increases repulsion → ion is LARGER. So FALSE.
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Final Answer:
1. T
2. F
3. F
4. T
5. T
6. F
7. T
8. T
9. T
10. F
11. T
12. F
13. F
14. F
15. T
16. F
17. T
18. T
19. T
20. T
21. F
Parent Tip: Review the logic above to help your child master the concept of chemistry periodic table worksheet.
