Periodic Table Facts worksheet for identifying element symbols, atomic numbers, periods, groups, and element characteristics.

Let’s solve this step by step.

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Part 1: Identify the symbol for each element

We’ll go one by one using standard periodic table symbols:

1. Oxygen → O
2. Hydrogen → H
3. Chlorine → Cl
4. Sodium → Na (already given in chart, but we’ll confirm)
5. Fluorine → F
6. Carbon → C
7. Helium → He
8. Nitrogen → N
9. Copper → Cu
10. Sulfur → S
11. Magnesium → Mg
12. Manganese → Mn
13. Neon → Ne
14. Bromine → Br
15. Phosphorous → P
16. Silver → Ag
17. Lead → Pb
18. Iron → Fe
19. Calcium → Ca
20. Potassium → K

✔ All these are standard chemical symbols you can find on any periodic table.

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Part 2: Fill in the chart

The chart has columns: Element, Symbol, Atomic Number, Period, Group

First row is done: Sodium → Na → 11 → 3 → 1

Now let’s fill the rest:

Row 2: Symbol = O → That’s Oxygen
→ Atomic number of Oxygen = 8
→ Period = 2 (second row of periodic table)
→ Group = 16 (or sometimes called group VIA — but modern IUPAC uses 1–18; oxygen is in group 16)

Row 3: Element = Krypton
→ Symbol = Kr
→ Atomic number = 36
→ Period = 4 (it’s in the 4th row)
→ Group = 18 (noble gases)

Row 4: Atomic Number = 79 → That’s Gold
→ Symbol = Au
→ Element = Gold
→ Period = 6
→ Group = 11

Row 5: Period = 4, Group = 7 → Look at periodic table:
Period 4, Group 7 → That’s Manganese
→ Symbol = Mn
→ Atomic number = 25

Wait — let me double-check that.

Group 7 in period 4:
Period 4 elements start with K (19), Ca (20), Sc (21), Ti (22), V (23), Cr (24), Mn (25) → yes, Mn is group 7? Actually, hold on!

In modern IUPAC numbering (groups 1–18):

- Group 1: alkali metals
- Group 2: alkaline earth
- Groups 3–12: transition metals
- Group 13 to 18: p-block

Actually, Manganese (Mn) is in group 7, yes — because it’s the 7th element in the d-block of period 4.

But wait — some tables label groups differently. Let’s be precise.

Standard modern periodic table (IUPAC 1–18):

- Group 7: includes Mn, Tc, Re, Bh → so yes, Mn is group 7.

Atomic number of Mn is 25 → correct.

So row 5:
Element = Manganese
Symbol = Mn
Atomic Number = 25
Period = 4
Group = 7

✔ Confirmed.

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Part 3: Give an atom with the following characteristics

We just need to give ONE example for each category.

a) Halogen → any from group 17: F, Cl, Br, I, At → pick Chlorine (Cl)
b) Chalcogen → group 16: O, S, Se, Te → pick Oxygen (O)
c) Alkali metal → group 1: Li, Na, K, Rb → pick Sodium (Na)
d) Actinide series → e.g., Uranium (U), Plutonium (Pu), Americium (Am) → pick Uranium (U)
e) Lanthanide series → e.g., Cerium (Ce), Neodymium (Nd), Europium (Eu) → pick Cerium (Ce)
f) Alkaline Earth metal → group 2: Be, Mg, Ca, Sr → pick Magnesium (Mg)
g) Transition metal → many choices: Fe, Cu, Zn, Ni → pick Iron (Fe)
h) Nobel gas → group 18: He, Ne, Ar, Kr → pick Neon (Ne)

Note: “Nobel gas” is a typo — should be “Noble gas”, but we understand.

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Now, compiling all answers clearly.

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Final Answer:

Part 1: Symbols

1. O
2. H
3. Cl
4. Na
5. F
6. C
7. He
8. N
9. Cu
10. S
11. Mg
12. Mn
13. Ne
14. Br
15. P
16. Ag
17. Pb
18. Fe
19. Ca
20. K

Part 2: Chart

| Element | Symbol | Atomic Number | Period | Group |
|-------------|--------|---------------|--------|-------|
| Sodium | Na | 11 | 3 | 1 |
| Oxygen | O | 8 | 2 | 16 |
| Krypton | Kr | 36 | 4 | 18 |
| Gold | Au | 79 | 6 | 11 |
| Manganese | Mn | 25 | 4 | 7 |

Part 3: Examples

a) Halogen → Cl
b) Chalcogen → O
c) Alkali metal → Na
d) Actinide series → U
e) Lanthanide series → Ce
f) Alkaline Earth metal → Mg
g) Transition metal → Fe
h) Noble gas → Ne

*(Note: Other correct answers are possible for Part 3 — as long as they fit the category.)*