Educational worksheet on periodic table families and element classification.

Here is the completed worksheet with explanations for each answer:

---

Periodic Table Families

1. What are the elements nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi) collectively called?
→ Pnictogens
*Explanation:* These elements belong to Group 15 of the periodic table and are known as the pnictogens. They share similar chemical properties, such as having five valence electrons.

2. What do you call a group of elements in the same row as you move from left to right across the periodic table?
→ Period
*Explanation:* A period refers to a horizontal row in the periodic table. Elements in the same period have the same number of electron shells.

3. How many groups or families are there on the periodic table?
→ 18
*Explanation:* The periodic table has 18 vertical columns, known as groups or families. Each group contains elements with similar chemical properties.

4. How many periods are there on the periodic table?
→ 7
*Explanation:* There are 7 horizontal rows (periods) in the periodic table, corresponding to the seven energy levels (electron shells) that electrons can occupy.

5. Are most elements in the periodic table classified as metals or nonmetals?
→ Metals
*Explanation:* About 80% of the elements are metals. They are located on the left and center of the periodic table, while nonmetals are on the right side.

6. Are the nonmetal elements on the periodic table’s left or right side?
→ Right side
*Explanation:* Nonmetals are found on the right side of the periodic table, including groups 14–18 (excluding hydrogen, which is an exception). Metals are primarily on the left and center.

7. The element that has the atomic number 17 is
→ Chlorine (Cl)
*Explanation:* Atomic number 17 corresponds to chlorine, a halogen in Group 17.

8. Ni is the symbol for what element?
→ Nickel
*Explanation:* "Ni" is the chemical symbol for nickel, a transition metal with atomic number 28.

9. Write down the symbol for two noble gases.
→ He, Ne (or any two from: He, Ne, Ar, Kr, Xe, Rn)
*Explanation:* Noble gases are found in Group 18. Examples include helium (He), neon (Ne), argon (Ar), etc. They are chemically inert due to full valence shells.

10. Write down the symbol for two transition metals.
→ Fe, Cu (or any two from: Fe, Co, Ni, Cr, Cu, Zn, etc.)
*Explanation:* Transition metals are located in Groups 3–12. Common examples include iron (Fe), copper (Cu), chromium (Cr), and zinc (Zn).

---

✔ All answers are based on standard periodic table knowledge. Let me know if you'd like this formatted as a printable PDF or need help visualizing the periodic table!