Interactive worksheet exploring elements with visual cues and questions about their properties and locations on the periodic table.
A colorful educational worksheet titled "Get to Know the Elements" featuring various questions and illustrations related to the periodic table, including images of a periodic table cube, a magnet, a water droplet, a human body, a bicycle, an egg, a leaf, and a crown.
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Step-by-step solution for: Get To Know The Elements: (C) Sunrise Science | PDF | Chemical ...
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Show Answer Key & Explanations
Step-by-step solution for: Get To Know The Elements: (C) Sunrise Science | PDF | Chemical ...
Let's go through each question on the worksheet "Get to Know the Elements" and provide accurate answers with explanations. The questions are based on general chemistry knowledge, periodic table trends, and real-world applications of elements.
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✔ Answer: 11
🔹 Explanation: At room temperature (about 20–25°C), 11 elements exist as gases:
- Hydrogen (H), Helium (He), Nitrogen (N), Oxygen (O), Fluorine (F), Neon (Ne), Chlorine (Cl), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn).
These are mostly found in Group 18 (Noble Gases) and some in Groups 14–17.
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✔ Answer: On the right side of the periodic table, especially Groups 14–18.
🔹 Explanation: Most gaseous elements are nonmetals, primarily located on the far right. Noble gases (Group 18) are all gases at room temperature.
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✔ Answer:
1. Iron (Fe)
2. Nickel (Ni)
3. Cobalt (Co)
🔹 Explanation: These three are the only naturally occurring ferromagnetic elements at room temperature. They are transition metals in Periods 4 and 5, mainly in Group 8 and 9.
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✔ Answer:
1. Oxygen (O) – ~65%
2. Carbon (C) – ~18%
3. Hydrogen (H) – ~10%
4. Nitrogen (N) – ~3%
5. Calcium (Ca) – ~1.5%
6. Phosphorus (P) – ~1.2%
7. Potassium (K) – ~0.35%
8. Sulfur (S) – ~0.25%
9. Sodium (Na) – ~0.15%
10. Chlorine (Cl) – ~0.15%
🔹 Explanation: These are the major elements forming proteins, DNA, water, bones, and other biological molecules.
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✔ Answer: Mostly in the left and center of the periodic table — including metals, metalloids, and nonmetals from Groups 1–18, but especially Groups 1, 2, 13–17.
🔹 Explanation: Many are essential biological elements like C, H, O, N, P, S, Ca, etc., which are distributed across various groups.
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✔ Answer:
1. Oxygen (O) – ~46%
2. Silicon (Si) – ~28%
3. Aluminum (Al) – ~8%
4. Iron (Fe) – ~5%
5. Calcium (Ca) – ~3.6%
6. Sodium (Na) – ~2.8%
7. Potassium (K) – ~2.6%
8. Magnesium (Mg) – ~2.1%
🔹 Explanation: These are the most abundant elements in rocks and minerals.
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✔ Answer: Lithium (Li) or Lead (Pb) or Nickel (Ni)
🔹 Explanation: Lithium is common in rechargeable batteries (like phone batteries). Lead-acid batteries use lead (Pb). Nickel-cadmium uses Ni and Cd.
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✔ Answer: Iron (Fe) or Carbon (C)
🔹 Explanation: Bicycles are made from steel (an alloy of iron and carbon), aluminum (Al), or titanium (Ti). But iron is a key component due to its strength and cost-effectiveness.
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✔ Answer: Titanium (Ti) – specifically Titanium Dioxide (TiO₂)
🔹 Explanation: Titanium dioxide is a white pigment widely used in paints, plastics, and cosmetics for its opacity and brightness.
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✔ Answer: Protein (mainly composed of Carbon, Hydrogen, Oxygen, Nitrogen, Sulfur)
But if asking for one element, then Nitrogen (N) or Sulfur (S)
🔹 Explanation: Eggs are rich in protein, and sulfur-containing amino acids (like cysteine and methionine) are important. So Sulfur is a key element.
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✔ Answer: Calcium (Ca)
🔹 Explanation: Bones are made of calcium phosphate (hydroxyapatite), so calcium is essential for bone strength.
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✔ Answer: Magnesium (Mg)
🔹 Explanation: The central atom in the chlorophyll molecule is magnesium, which is vital for photosynthesis in plants.
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✔ Answer:
1. Mercury (Hg)
2. Bromine (Br)
🔹 Explanation: Mercury is a metal that is liquid at room temperature. Bromine is a nonmetal halogen that is also liquid. Both are rare exceptions.
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✔ Answer: Technetium (Tc, atomic number 43)
🔹 Explanation: Technetium is the first element with no stable isotopes. All its isotopes are radioactive. It was the first artificially produced element.
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✔ Answer: About 38 elements are naturally radioactive.
🔹 Explanation: Elements with atomic numbers 84 and above (e.g., Polonium, Radon, Uranium) are radioactive. Also, some lighter elements like Technetium (43) and Promethium (61) have no stable isotopes.
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✔ Answer: On the bottom right of the periodic table, especially after Uranium (92) and in Actinide series (below Period 7).
🔹 Explanation: Heavy elements are unstable due to large nuclei, leading to radioactivity.
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✔ Answer:
1. Gold (Au)
2. Silver (Ag)
3. Platinum (Pt)
4. Palladium (Pd)
5. Rhodium (Rh)
6. Ruthenium (Ru)
7. Osmium (Os)
8. Iridium (Ir)
🔹 Explanation: These are resistant to corrosion and oxidation. They are transition metals in Groups 8–10 and 11, often found in the lower right of the d-block.
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✔ Answer: In the middle to right of the periodic table, specifically in Groups 8–11, in the transition metals region.
🔹 Explanation: They are part of the d-block and are known for their resistance to tarnishing.
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| Question | Answer |
|--------|--------|
| Gaseous elements at room temp | 11 |
| Location of gaseous elements | Right side (Groups 14–18) |
| Magnetic elements | Fe, Ni, Co |
| Top 10 in human body | O, C, H, N, Ca, P, K, S, Na, Cl |
| Location of human body elements | Left-center (Groups 1–18) |
| Top 8 in Earth's crust | O, Si, Al, Fe, Ca, Na, K, Mg |
| Element in batteries | Li, Pb, Ni |
| Element in bicycles | Fe, C |
| Element in paint | Ti (Titanium) |
| Element in eggs | S (Sulfur) |
| Element in bones | Ca (Calcium) |
| Element in chlorophyll | Mg (Magnesium) |
| Liquid at room temp | Hg, Br |
| Radioactive with lowest Z | Tc (Technetium) |
| Number of radioactive elements | ~38 (mostly Z ≥ 84) |
| Radioactive location | Bottom right (Actinides) |
| Noble Metals | Au, Ag, Pt, Pd, Rh, Ru, Os, Ir |
| Noble Metal location | Groups 8–11 (d-block) |
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This worksheet helps students connect chemistry to everyday life and understand periodic trends. Let me know if you'd like this turned into a printable answer key!
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🔹 How many elements are gaseous at room temperature?
✔ Answer: 11
🔹 Explanation: At room temperature (about 20–25°C), 11 elements exist as gases:
- Hydrogen (H), Helium (He), Nitrogen (N), Oxygen (O), Fluorine (F), Neon (Ne), Chlorine (Cl), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn).
These are mostly found in Group 18 (Noble Gases) and some in Groups 14–17.
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🔹 Where do the gaseous elements tend to be located on the table?
✔ Answer: On the right side of the periodic table, especially Groups 14–18.
🔹 Explanation: Most gaseous elements are nonmetals, primarily located on the far right. Noble gases (Group 18) are all gases at room temperature.
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🔹 Which elements are magnetic?
✔ Answer:
1. Iron (Fe)
2. Nickel (Ni)
3. Cobalt (Co)
🔹 Explanation: These three are the only naturally occurring ferromagnetic elements at room temperature. They are transition metals in Periods 4 and 5, mainly in Group 8 and 9.
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🔹 What are the top ten most abundant elements in the human body?
✔ Answer:
1. Oxygen (O) – ~65%
2. Carbon (C) – ~18%
3. Hydrogen (H) – ~10%
4. Nitrogen (N) – ~3%
5. Calcium (Ca) – ~1.5%
6. Phosphorus (P) – ~1.2%
7. Potassium (K) – ~0.35%
8. Sulfur (S) – ~0.25%
9. Sodium (Na) – ~0.15%
10. Chlorine (Cl) – ~0.15%
🔹 Explanation: These are the major elements forming proteins, DNA, water, bones, and other biological molecules.
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🔹 Where do the elements in the human body tend to be located on the table?
✔ Answer: Mostly in the left and center of the periodic table — including metals, metalloids, and nonmetals from Groups 1–18, but especially Groups 1, 2, 13–17.
🔹 Explanation: Many are essential biological elements like C, H, O, N, P, S, Ca, etc., which are distributed across various groups.
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🔹 What are the top eight elements found in the Earth’s crust?
✔ Answer:
1. Oxygen (O) – ~46%
2. Silicon (Si) – ~28%
3. Aluminum (Al) – ~8%
4. Iron (Fe) – ~5%
5. Calcium (Ca) – ~3.6%
6. Sodium (Na) – ~2.8%
7. Potassium (K) – ~2.6%
8. Magnesium (Mg) – ~2.1%
🔹 Explanation: These are the most abundant elements in rocks and minerals.
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🔹 What element is used in batteries?
✔ Answer: Lithium (Li) or Lead (Pb) or Nickel (Ni)
🔹 Explanation: Lithium is common in rechargeable batteries (like phone batteries). Lead-acid batteries use lead (Pb). Nickel-cadmium uses Ni and Cd.
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🔹 What element is used in bicycles?
✔ Answer: Iron (Fe) or Carbon (C)
🔹 Explanation: Bicycles are made from steel (an alloy of iron and carbon), aluminum (Al), or titanium (Ti). But iron is a key component due to its strength and cost-effectiveness.
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🔹 What element is used in making paint?
✔ Answer: Titanium (Ti) – specifically Titanium Dioxide (TiO₂)
🔹 Explanation: Titanium dioxide is a white pigment widely used in paints, plastics, and cosmetics for its opacity and brightness.
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🔹 What is a major element found in eggs?
✔ Answer: Protein (mainly composed of Carbon, Hydrogen, Oxygen, Nitrogen, Sulfur)
But if asking for one element, then Nitrogen (N) or Sulfur (S)
🔹 Explanation: Eggs are rich in protein, and sulfur-containing amino acids (like cysteine and methionine) are important. So Sulfur is a key element.
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🔹 What is a major element found in our bones?
✔ Answer: Calcium (Ca)
🔹 Explanation: Bones are made of calcium phosphate (hydroxyapatite), so calcium is essential for bone strength.
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🔹 What is a major element found in chlorophyll?
✔ Answer: Magnesium (Mg)
🔹 Explanation: The central atom in the chlorophyll molecule is magnesium, which is vital for photosynthesis in plants.
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🔹 Which elements are liquid at room temperature?
✔ Answer:
1. Mercury (Hg)
2. Bromine (Br)
🔹 Explanation: Mercury is a metal that is liquid at room temperature. Bromine is a nonmetal halogen that is also liquid. Both are rare exceptions.
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🔹 What radioactive element has the lowest atomic number?
✔ Answer: Technetium (Tc, atomic number 43)
🔹 Explanation: Technetium is the first element with no stable isotopes. All its isotopes are radioactive. It was the first artificially produced element.
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🔹 How many of the elements are radioactive?
✔ Answer: About 38 elements are naturally radioactive.
🔹 Explanation: Elements with atomic numbers 84 and above (e.g., Polonium, Radon, Uranium) are radioactive. Also, some lighter elements like Technetium (43) and Promethium (61) have no stable isotopes.
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🔹 Where do the radioactive elements tend to be located on the table?
✔ Answer: On the bottom right of the periodic table, especially after Uranium (92) and in Actinide series (below Period 7).
🔹 Explanation: Heavy elements are unstable due to large nuclei, leading to radioactivity.
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🔹 Which elements are considered "Noble Metals"?
✔ Answer:
1. Gold (Au)
2. Silver (Ag)
3. Platinum (Pt)
4. Palladium (Pd)
5. Rhodium (Rh)
6. Ruthenium (Ru)
7. Osmium (Os)
8. Iridium (Ir)
🔹 Explanation: These are resistant to corrosion and oxidation. They are transition metals in Groups 8–10 and 11, often found in the lower right of the d-block.
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🔹 Where do the Noble Metals tend to be located on the table?
✔ Answer: In the middle to right of the periodic table, specifically in Groups 8–11, in the transition metals region.
🔹 Explanation: They are part of the d-block and are known for their resistance to tarnishing.
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✔ Final Summary Table:
| Question | Answer |
|--------|--------|
| Gaseous elements at room temp | 11 |
| Location of gaseous elements | Right side (Groups 14–18) |
| Magnetic elements | Fe, Ni, Co |
| Top 10 in human body | O, C, H, N, Ca, P, K, S, Na, Cl |
| Location of human body elements | Left-center (Groups 1–18) |
| Top 8 in Earth's crust | O, Si, Al, Fe, Ca, Na, K, Mg |
| Element in batteries | Li, Pb, Ni |
| Element in bicycles | Fe, C |
| Element in paint | Ti (Titanium) |
| Element in eggs | S (Sulfur) |
| Element in bones | Ca (Calcium) |
| Element in chlorophyll | Mg (Magnesium) |
| Liquid at room temp | Hg, Br |
| Radioactive with lowest Z | Tc (Technetium) |
| Number of radioactive elements | ~38 (mostly Z ≥ 84) |
| Radioactive location | Bottom right (Actinides) |
| Noble Metals | Au, Ag, Pt, Pd, Rh, Ru, Os, Ir |
| Noble Metal location | Groups 8–11 (d-block) |
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This worksheet helps students connect chemistry to everyday life and understand periodic trends. Let me know if you'd like this turned into a printable answer key!
Parent Tip: Review the logic above to help your child master the concept of getting to know the periodic table worksheet.
