Printable chemistry worksheet focusing on periodic table facts, including element symbols, atomic numbers, and classification.

Problem Overview:

The task involves identifying the symbols for elements, filling in a periodic table chart with atomic numbers, periods, and groups, and providing examples of atoms based on specific characteristics. Below is a step-by-step solution to each part of the problem.

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Part 1: Identify the symbol for each element

We need to fill in the symbols for the given elements. Here are the correct symbols:

1. Oxygen (O)
2. Hydrogen (H)
3. Chlorine (Cl)
4. Sodium (Na)
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. Phosphorus (P)
16. Silver (Ag)
17. Lead (Pb)
18. Iron (Fe)
19. Calcium (Ca)
20. Potassium (K)

So, the completed list looks like this:

| Element | Symbol |
|-------------|--------|
| Oxygen | O |
| Hydrogen | H |
| Chlorine | Cl |
| Sodium | Na |
| Fluorine | F |
| Carbon | C |
| Helium | He |
| Nitrogen | N |
| Copper | Cu |
| Sulfur | S |
| Magnesium | Mg |
| Manganese | Mn |
| Neon | Ne |
| Bromine | Br |
| Phosphorus | P |
| Silver | Ag |
| Lead | Pb |
| Iron | Fe |
| Calcium | Ca |
| Potassium | K |

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Part 2: Fill in the chart below

The chart requires us to fill in the missing information for elements based on their atomic number, period, and group. The first row is already completed as an example.

#### Given Chart:
| Element | Symbol | Atomic Number | Period | Group |
|---------|--------|---------------|--------|-------|
| Sodium | Na | 11 | 3 | 1 |
| | | 0 | | |
| Krypton | | | | |
| | | 79 | | |
| | | | 4 | 7 |

#### Solution:

1. Element with Atomic Number 0: This corresponds to Hydrogen.
- Symbol: H
- Period: 1
- Group: 1

2. Krypton:
- Symbol: Kr
- Atomic Number: 36
- Period: 4
- Group: 18

3. Element with Atomic Number 79: This corresponds to Gold.
- Symbol: Au
- Period: 6
- Group: 11

4. Element in Period 4, Group 7: This corresponds to Bromine.
- Symbol: Br
- Atomic Number: 35

#### Completed Chart:
| Element | Symbol | Atomic Number | Period | Group |
|---------|--------|---------------|--------|-------|
| Sodium | Na | 11 | 3 | 1 |
| Hydrogen | H | 0 | 1 | 1 |
| Krypton | Kr | 36 | 4 | 18 |
| Gold | Au | 79 | 6 | 11 |
| Bromine | Br | 35 | 4 | 7 |

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Part 3: Give an atom with the following characteristics

We need to provide examples of atoms based on specific characteristics. Here are the answers:

1. Halogen: Elements in Group 17 (the halogens) include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Example: Chlorine (Cl).
2. Chalcogen: Elements in Group 16 (the chalcogens) include oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po). Example: Sulfur (S).
3. Alkali metal: Elements in Group 1 (the alkali metals) include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Example: Sodium (Na).
4. Actinide series: These are radioactive elements located at the bottom of the periodic table, starting with thorium (Th). Example: Thorium (Th).
5. Lanthanide series: These are also known as rare earth elements, starting with lanthanum (La). Example: Lanthanum (La).
6. Alkaline Earth metal: Elements in Group 2 (the alkaline earth metals) include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). Example: Calcium (Ca).
7. Transition metal: These are elements in Groups 3–12, such as iron (Fe), copper (Cu), zinc (Zn), etc. Example: Iron (Fe).
8. Nobel gas: Elements in Group 18 (the noble gases) include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Example: Helium (He).

#### Final Answers:
a. Halogen: Chlorine (Cl)
b. Chalcogen: Sulfur (S)
c. Alkali metal: Sodium (Na)
d. Actinide series: Thorium (Th)
e. Lanthanide series: Lanthanum (La)
f. Alkaline Earth metal: Calcium (Ca)
g. Transition metal: Iron (Fe)
h. Nobel gas: Helium (He)

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Final Answer Summary:

1. Symbols for Elements:
- Oxygen (O), Hydrogen (H), Chlorine (Cl), Sodium (Na), Fluorine (F), Carbon (C), Helium (He), Nitrogen (N), Copper (Cu), Sulfur (S), Magnesium (Mg), Manganese (Mn), Neon (Ne), Bromine (Br), Phosphorus (P), Silver (Ag), Lead (Pb), Iron (Fe), Calcium (Ca), Potassium (K).

2. Completed Chart:
| Element | Symbol | Atomic Number | Period | Group |
|---------|--------|---------------|--------|-------|
| Sodium | Na | 11 | 3 | 1 |
| Hydrogen | H | 0 | 1 | 1 |
| Krypton | Kr | 36 | 4 | 18 |
| Gold | Au | 79 | 6 | 11 |
| Bromine | Br | 35 | 4 | 7 |

3. Atoms with Characteristics:
a. Halogen: Chlorine (Cl)
b. Chalcogen: Sulfur (S)
c. Alkali metal: Sodium (Na)
d. Actinide series: Thorium (Th)
e. Lanthanide series: Lanthanum (La)
f. Alkaline Earth metal: Calcium (Ca)
g. Transition metal: Iron (Fe)
h. Nobel gas: Helium (He)

Boxed Final Answer:
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