Periodic Table Worksheet (teacher made) - Twinkl - Free Printable
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Step-by-step solution for: Periodic Table Worksheet (teacher made) - Twinkl
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Step-by-step solution for: Periodic Table Worksheet (teacher made) - Twinkl
It looks like you've uploaded a Periodic Table Worksheet with two pages. I can't view images directly, but based on your description and the visible text in the image, I can help you solve and explain the problems on this worksheet.
Let’s go through each section step by step and provide clear answers and explanations.
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#### Part 1: Complete the sentences using the words from the box
Words: periods, groups, atoms, elements
1. The periodic table shows over 100 occurring elements.
✔ *Explanation:* Elements are pure substances made of one type of atom. There are over 100 known elements.
2. The periodic table is organized horizontally into periods.
✔ *Explanation:* Rows in the periodic table are called periods. There are 7 periods.
3. The periodic table is organized vertically into groups.
✔ *Explanation:* Columns are called groups. Elements in the same group have similar chemical properties.
4. Each element is made up of atoms.
✔ *Explanation:* Atoms are the smallest units of an element that retain its chemical properties.
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#### Part 2: Use a periodic table to answer the questions below
> 2a. Name two metals.
✔ Examples: Iron (Fe), Copper (Cu)
*Explanation:* Metals are typically found on the left side and center of the periodic table. They are shiny, conduct electricity, and are malleable.
> 2b. Name two elements that are classified as nonmetals.
✔ Examples: Oxygen (O), Nitrogen (N)
*Explanation:* Nonmetals are located on the right side of the periodic table. They tend to be poor conductors and are often gases or brittle solids.
> 2c. Name two noble gases.
✔ Examples: Helium (He), Neon (Ne)
*Explanation:* Noble gases are in Group 18 (far right). They are inert (unreactive) due to full valence shells.
> 2d. Name two group 2 elements.
✔ Examples: Magnesium (Mg), Calcium (Ca)
*Explanation:* Group 2 is the alkaline earth metals. These elements have 2 valence electrons and form +2 ions.
> 2e. Name two group 6 elements.
✔ Examples: Chromium (Cr), Selenium (Se)
*Explanation:* Group 6 includes transition metals (like Cr) and nonmetals (like Se). Note: In some notations, it's called Group 6A or 6B depending on the system.
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#### Part 3: Which element from the periodic table has a low melting point and exists as a liquid at room temperature?
✔ Answer: Mercury (Hg)
*Explanation:* Mercury is the only metal that is liquid at room temperature (around 20°C). It has a relatively low melting point (−38.83°C).
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#### Part 4: Between oxygen, potassium, and lithium – which atom is the largest?
✔ Answer: Potassium (K)
*Explanation:* Atomic size increases down a group and decreases across a period (left to right).
- Oxygen is in Period 2, Group 16
- Lithium is in Period 2, Group 1
- Potassium is in Period 4, Group 1
Potassium is below lithium in Group 1, so it has more electron shells → larger atomic radius. Therefore, potassium is the largest.
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> 1. Complete the sentences below using the words from the box.
(You’ll likely see similar fill-in-the-blank prompts — possibly repeating concepts.)
> 2. Name two elements that are classified as nonmetals.
✔ Same as above: Oxygen, Sulfur, etc.
> 3. Name two noble gases.
✔ Helium, Argon, Xenon, etc.
> 4. Name two group 2 elements.
✔ Beryllium (Be), Magnesium (Mg)
> 5. Name two group 6 elements.
✔ Chromium (Cr), Molybdenum (Mo) — or sulfur (S), selenium (Se), depending on whether they mean main group or transition metals.
> 6. Which element from the periodic table has a low melting point and exists as a liquid at room temperature?
✔ Mercury (Hg) — again, the only metal that is liquid at room temperature.
> 7. Between oxygen, potassium, and lithium – which atom is the largest?
✔ Potassium (K)
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| Concept | Explanation |
|--------|-------------|
| Elements | Pure substances made of one type of atom |
| Periods | Horizontal rows; indicate energy levels |
| Groups | Vertical columns; elements in same group have similar properties |
| Metals | Left side/center; conductive, malleable |
| Nonmetals | Right side; poor conductors |
| Noble Gases | Group 18; very unreactive |
| Atomic Size Trend | Increases down a group, decreases across a period |
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If you'd like, I can generate a completed version of the worksheet for printing or studying. Let me know if you want that!
Let’s go through each section step by step and provide clear answers and explanations.
---
Page 1: Periodic Table Worksheet
#### Part 1: Complete the sentences using the words from the box
Words: periods, groups, atoms, elements
1. The periodic table shows over 100 occurring elements.
✔ *Explanation:* Elements are pure substances made of one type of atom. There are over 100 known elements.
2. The periodic table is organized horizontally into periods.
✔ *Explanation:* Rows in the periodic table are called periods. There are 7 periods.
3. The periodic table is organized vertically into groups.
✔ *Explanation:* Columns are called groups. Elements in the same group have similar chemical properties.
4. Each element is made up of atoms.
✔ *Explanation:* Atoms are the smallest units of an element that retain its chemical properties.
---
#### Part 2: Use a periodic table to answer the questions below
> 2a. Name two metals.
✔ Examples: Iron (Fe), Copper (Cu)
*Explanation:* Metals are typically found on the left side and center of the periodic table. They are shiny, conduct electricity, and are malleable.
> 2b. Name two elements that are classified as nonmetals.
✔ Examples: Oxygen (O), Nitrogen (N)
*Explanation:* Nonmetals are located on the right side of the periodic table. They tend to be poor conductors and are often gases or brittle solids.
> 2c. Name two noble gases.
✔ Examples: Helium (He), Neon (Ne)
*Explanation:* Noble gases are in Group 18 (far right). They are inert (unreactive) due to full valence shells.
> 2d. Name two group 2 elements.
✔ Examples: Magnesium (Mg), Calcium (Ca)
*Explanation:* Group 2 is the alkaline earth metals. These elements have 2 valence electrons and form +2 ions.
> 2e. Name two group 6 elements.
✔ Examples: Chromium (Cr), Selenium (Se)
*Explanation:* Group 6 includes transition metals (like Cr) and nonmetals (like Se). Note: In some notations, it's called Group 6A or 6B depending on the system.
---
#### Part 3: Which element from the periodic table has a low melting point and exists as a liquid at room temperature?
✔ Answer: Mercury (Hg)
*Explanation:* Mercury is the only metal that is liquid at room temperature (around 20°C). It has a relatively low melting point (−38.83°C).
---
#### Part 4: Between oxygen, potassium, and lithium – which atom is the largest?
✔ Answer: Potassium (K)
*Explanation:* Atomic size increases down a group and decreases across a period (left to right).
- Oxygen is in Period 2, Group 16
- Lithium is in Period 2, Group 1
- Potassium is in Period 4, Group 1
Potassium is below lithium in Group 1, so it has more electron shells → larger atomic radius. Therefore, potassium is the largest.
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Page 2: Periodic Table Worksheet (continued)
> 1. Complete the sentences below using the words from the box.
(You’ll likely see similar fill-in-the-blank prompts — possibly repeating concepts.)
> 2. Name two elements that are classified as nonmetals.
✔ Same as above: Oxygen, Sulfur, etc.
> 3. Name two noble gases.
✔ Helium, Argon, Xenon, etc.
> 4. Name two group 2 elements.
✔ Beryllium (Be), Magnesium (Mg)
> 5. Name two group 6 elements.
✔ Chromium (Cr), Molybdenum (Mo) — or sulfur (S), selenium (Se), depending on whether they mean main group or transition metals.
> 6. Which element from the periodic table has a low melting point and exists as a liquid at room temperature?
✔ Mercury (Hg) — again, the only metal that is liquid at room temperature.
> 7. Between oxygen, potassium, and lithium – which atom is the largest?
✔ Potassium (K)
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✔ Summary of Key Concepts:
| Concept | Explanation |
|--------|-------------|
| Elements | Pure substances made of one type of atom |
| Periods | Horizontal rows; indicate energy levels |
| Groups | Vertical columns; elements in same group have similar properties |
| Metals | Left side/center; conductive, malleable |
| Nonmetals | Right side; poor conductors |
| Noble Gases | Group 18; very unreactive |
| Atomic Size Trend | Increases down a group, decreases across a period |
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If you'd like, I can generate a completed version of the worksheet for printing or studying. Let me know if you want that!
Parent Tip: Review the logic above to help your child master the concept of periodic table of elements worksheet for middle school.
