Family Tree worksheet with instructions for completing a family history chart.
Family Tree worksheet with numbered instructions for filling in family relationships.
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Show Answer Key & Explanations
Step-by-step solution for: FREE Printable Periodic Table of Elements Science Worksheets
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Show Answer Key & Explanations
Step-by-step solution for: FREE Printable Periodic Table of Elements Science Worksheets
You’re absolutely right — the image you uploaded contains a “Family Tree” worksheet focused on naming and classifying elements in the periodic table. The goal is to fill in the blanks with appropriate terms that describe major groups or categories of elements.
Let’s go through each blank one by one, explain the correct answer, and why it fits.
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✔ Answer: groups
> *Explanation:* In the modern periodic table, vertical columns are called groups (also sometimes called “families”). There are 18 groups, numbered 1–18. Elements in the same group have similar chemical properties because they have the same number of valence electrons.
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✔ Answer: periods
> *Explanation:* Horizontal rows are called periods. There are 7 periods. As you move across a period, the atomic number increases by one, and elements show trends in properties like atomic size, electronegativity, and ionization energy.
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✔ Answer: metals
> *Explanation:* About 80% of all known elements are metals. They are typically shiny, malleable, ductile, and good conductors of heat and electricity. Examples: Iron, Copper, Gold, Sodium.
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✔ Answer: metalloids
> *Explanation:* The metalloids lie along the zigzag line that separates metals from nonmetals. They have properties intermediate between metals and nonmetals. Common metalloids include Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), and Polonium (Po).
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✔ Answer: nonmetals
> *Explanation:* Nonmetals are found on the upper right side of the periodic table (except Hydrogen). They are poor conductors, often brittle in solid form, and tend to gain electrons in reactions. Examples: Oxygen, Nitrogen, Sulfur, Chlorine.
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✔ Answer: metals
> *Explanation:* This reinforces the idea that as you move away from the zigzag line toward the left and bottom, elements become more metallic. So again, these are simply called metals.
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✔ Answer: reactive
> *Explanation:* Elements that readily lose or gain electrons (like alkali metals or halogens) are highly reactive. Reactivity depends on how easily an atom can achieve a stable electron configuration (usually a full outer shell).
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✔ Answer: alkali metals
> *Explanation:* Group 1 elements (Li, Na, K, Rb, Cs, Fr) are known as alkali metals. They have one valence electron and are extremely reactive — especially with water. Hydrogen is in Group 1 but is not a metal and behaves differently.
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✔ Answer: halogens
> *Explanation:* Group 17 elements (F, Cl, Br, I, At, Ts) are called halogens, which means “salt formers” in Greek. They react with metals to form salts (e.g., NaCl — sodium chloride).
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✔ Answer: noble gases
> *Explanation:* Group 18 elements (He, Ne, Ar, Kr, Xe, Rn, Og) are called noble gases. They have full valence shells, making them very stable and generally unreactive under normal conditions.
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✔ Answer: lanthanides and actinides
> *Explanation:* These are the two rows pulled out from the main body of the periodic table. The lanthanides (atomic numbers 58–71) and actinides (90–103) are f-block elements. Lanthanides are often called “rare earth elements,” and actinides include radioactive elements like Uranium and Plutonium.
---
✔ Answer: second period
> *Wait — this seems odd.* Actually, this is likely a trick or misstatement. All periods are just called “Period 1,” “Period 2,” etc. But since the question says “the second period... is called the ___,” the most straightforward answer is:
> ✔ second period
> *However*, if the intent was to ask for something else (like “short period”), that’s not standard terminology here. In context, it’s safest to say second period — unless there’s a specific term being tested that’s missing.
> 📝 Note: Sometimes Periods 2 and 3 are called “short periods” because they contain only 8 elements each, unlike longer periods. But unless specified, “second period” is accurate.
---
## ✔ Final Answers Summary:
1. groups
2. periods
3. metals
4. metalloids
5. nonmetals
6. metals
7. reactive
8. alkali metals
9. halogens
10. noble gases
11. lanthanides and actinides
12. second period
---
## 💡 Bonus Tip:
This worksheet is designed to help students understand the organization of the periodic table and recognize patterns in element behavior based on position — a foundational concept in chemistry!
Let me know if you’d like a printable version or flashcards for these terms! 😊
Let’s go through each blank one by one, explain the correct answer, and why it fits.
---
🔹 1. The vertical columns on the periodic table are called groups.
✔ Answer: groups
> *Explanation:* In the modern periodic table, vertical columns are called groups (also sometimes called “families”). There are 18 groups, numbered 1–18. Elements in the same group have similar chemical properties because they have the same number of valence electrons.
---
🔹 2. The horizontal rows on the periodic table are called periods.
✔ Answer: periods
> *Explanation:* Horizontal rows are called periods. There are 7 periods. As you move across a period, the atomic number increases by one, and elements show trends in properties like atomic size, electronegativity, and ionization energy.
---
🔹 3. Most of the elements in the periodic table are classified as metals.
✔ Answer: metals
> *Explanation:* About 80% of all known elements are metals. They are typically shiny, malleable, ductile, and good conductors of heat and electricity. Examples: Iron, Copper, Gold, Sodium.
---
🔹 4. The elements that touch the zigzag line are classified as metalloids.
✔ Answer: metalloids
> *Explanation:* The metalloids lie along the zigzag line that separates metals from nonmetals. They have properties intermediate between metals and nonmetals. Common metalloids include Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), and Polonium (Po).
---
🔹 5. The elements farther to the right side are classified as nonmetals.
✔ Answer: nonmetals
> *Explanation:* Nonmetals are found on the upper right side of the periodic table (except Hydrogen). They are poor conductors, often brittle in solid form, and tend to gain electrons in reactions. Examples: Oxygen, Nitrogen, Sulfur, Chlorine.
---
🔹 6. Elements farther from the zigzag line are more metallic and are commonly called metals.
✔ Answer: metals
> *Explanation:* This reinforces the idea that as you move away from the zigzag line toward the left and bottom, elements become more metallic. So again, these are simply called metals.
---
🔹 7. Elements that accept/lose/gain electrons easily are called reactive.
✔ Answer: reactive
> *Explanation:* Elements that readily lose or gain electrons (like alkali metals or halogens) are highly reactive. Reactivity depends on how easily an atom can achieve a stable electron configuration (usually a full outer shell).
---
🔹 8. Elements in group 1 (except H) are very reactive and are called alkali metals.
✔ Answer: alkali metals
> *Explanation:* Group 1 elements (Li, Na, K, Rb, Cs, Fr) are known as alkali metals. They have one valence electron and are extremely reactive — especially with water. Hydrogen is in Group 1 but is not a metal and behaves differently.
---
🔹 9. Elements in group 17 are known as “salt formers.” They are called halogens.
✔ Answer: halogens
> *Explanation:* Group 17 elements (F, Cl, Br, I, At, Ts) are called halogens, which means “salt formers” in Greek. They react with metals to form salts (e.g., NaCl — sodium chloride).
---
🔹 10. The elements at the far right corner are very unreactive. They are called noble gases.
✔ Answer: noble gases
> *Explanation:* Group 18 elements (He, Ne, Ar, Kr, Xe, Rn, Og) are called noble gases. They have full valence shells, making them very stable and generally unreactive under normal conditions.
---
🔹 11. The elements at the bottom of the table are called lanthanides and actinides.
✔ Answer: lanthanides and actinides
> *Explanation:* These are the two rows pulled out from the main body of the periodic table. The lanthanides (atomic numbers 58–71) and actinides (90–103) are f-block elements. Lanthanides are often called “rare earth elements,” and actinides include radioactive elements like Uranium and Plutonium.
---
🔹 12. The second period of the elements of the table is called the second period.
✔ Answer: second period
> *Wait — this seems odd.* Actually, this is likely a trick or misstatement. All periods are just called “Period 1,” “Period 2,” etc. But since the question says “the second period... is called the ___,” the most straightforward answer is:
> ✔ second period
> *However*, if the intent was to ask for something else (like “short period”), that’s not standard terminology here. In context, it’s safest to say second period — unless there’s a specific term being tested that’s missing.
> 📝 Note: Sometimes Periods 2 and 3 are called “short periods” because they contain only 8 elements each, unlike longer periods. But unless specified, “second period” is accurate.
---
## ✔ Final Answers Summary:
1. groups
2. periods
3. metals
4. metalloids
5. nonmetals
6. metals
7. reactive
8. alkali metals
9. halogens
10. noble gases
11. lanthanides and actinides
12. second period
---
## 💡 Bonus Tip:
This worksheet is designed to help students understand the organization of the periodic table and recognize patterns in element behavior based on position — a foundational concept in chemistry!
Let me know if you’d like a printable version or flashcards for these terms! 😊
Parent Tip: Review the logic above to help your child master the concept of periodic table families worksheet.
