Free Printable Periodic Table Worksheets - Free Printable

Let's solve each question step by step using knowledge of the Periodic Table.

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Part A: Using your knowledge of the Periodic Table

1. Ni is the symbol for what element?
- Answer: Nickel
- *Explanation:* "Ni" is the chemical symbol for Nickel, a transition metal.

2. The element that has the atomic number 17 is?
- Answer: Chlorine
- *Explanation:* The element with atomic number 17 is Chlorine (Cl), located in Group 17 (Halogens).

3. Cu, Ag, and Au are all in what group?
- Answer: Group 11
- *Explanation:*
- Cu = Copper
- Ag = Silver
- Au = Gold
All three are in Group 11 of the periodic table (transition metals).

4. What is the symbol for the element with atomic number 74?
- Answer: W
- *Explanation:* Atomic number 74 corresponds to Tungsten, whose symbol is W (from its Latin name *Wolfram*).

5. What is the atomic mass of copper?
- Answer: Approximately 63.55 u
- *Explanation:* The average atomic mass of copper (Cu) is 63.55 atomic mass units (u), as listed on the periodic table.

6. What is the last element in period 4?
- Answer: Kr (Krypton)
- *Explanation:* Period 4 ends with Krypton (Kr), which has an atomic number of 36.

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Part B: Fill in the blanks

1. The number of protons in an atom is the ________ number.
- Answer: Atomic
- *Explanation:* The atomic number defines the number of protons in the nucleus.

2. The total of the protons and neutrons of an atom is the atom's ________ number.
- Answer: Mass
- *Explanation:* The mass number is the sum of protons and neutrons in the nucleus.

3. The elements in group ____ are the most reactive metals.
- Answer: 1
- *Explanation:* Group 1 elements (alkali metals like Li, Na, K) are the most reactive metals because they have one valence electron and readily lose it.

4. The elements in group ____ are the most reactive nonmetals.
- Answer: 17
- *Explanation:* Group 17 elements (halogens like F, Cl, Br) are the most reactive nonmetals because they need only one electron to complete their outer shell.

5. The elements in group ____ are very unreactive.
- Answer: 18
- *Explanation:* Group 18 elements (noble gases like He, Ne, Ar) are very unreactive because they have full valence shells and are chemically stable.

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✔ Final Answers:

#### Part A
1. Nickel
2. Chlorine
3. Group 11
4. W
5. 63.55 u
6. Kr

#### Part B
1. Atomic
2. Mass
3. 1
4. 17
5. 18

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