Free Printable Periodic Table Worksheets - Free Printable

Let’s go step by step to fill in the blanks using the words from the box.

We have these words to choose from:
repeating pattern, 50, periods, similar, center, 100, increasing, groups, properties, repeating patterns, far right, far left, protons

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First paragraph:

> In 1869, Mendeleev published his arrangement of the known elements in the “periodic table”. Just over ______ elements were arranged using details of their ______ and compounds. This table revealed ______ in the chemical properties of the elements in the same vertical column.

- Mendeleev knew about around 63 elements back then — but since that’s not in the box, and “just over” is used, the closest number in the box is 50. (Actually, historically it was more than 50, so “just over 50” makes sense.)
- He arranged them based on their properties (like how they react) and compounds.
- The table showed a repeating pattern (or “repeating patterns”) — both are in the box. Since it says “revealed ______”, singular or plural? Looking at context: “in the chemical properties... in the same vertical column” → this refers to the periodic law — properties repeat periodically → so “repeating pattern” fits best as a general idea. But note: later we see “repeating patterns” also listed. Let’s hold that thought.

Wait — actually, looking ahead, the next part talks about rows and columns, and the word “groups” and “periods” come up. Also, the phrase “revealed ______ in the chemical properties...” — the standard term is “a repeating pattern”.

But let’s check the exact wording in science: Mendeleev noticed that when elements are arranged by atomic mass (he didn’t know about atomic number yet), their properties repeated at regular intervals — so “repeating pattern” is correct.

So:
→ just over 50
→ details of their properties
→ revealed repeating pattern

*(Note: Some sources say he had 63 elements, but since 50 is the only option close and “just over 50” is acceptable for educational purposes, we’ll use 50.)*

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Second paragraph:

> The elements of the periodic table are arranged in the order of ______ atomic number. The atomic number reflects the number of ______ in the nucleus of each atom.

- Arranged in order of increasing atomic number → yes, that’s standard.
- Atomic number = number of protons → definitely.

So:
→ increasing
→ protons

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Third paragraph:

> Elements are arranged in rows of increasing atomic numbers called ______. Elements with similar properties are arranged in the same vertical column, called ______.

- Rows = periods
- Columns = groups

So:
→ periods
→ groups

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Fourth paragraph:

> Metals are grouped on the left and ______ of the periodic table. Gasses are positioned on the ______ of the periodic table (except hydrogen). Semiconductors are grouped between metals and non-metals and have some properties that are ______ to both types of elements.

- Metals are on the left and center? Wait — actually, metals are mostly on the left and center, but the box has “far left” and “center”. Let’s think: alkali metals are far left, transition metals are center, so “left and center” makes sense. But the blank says “left and ______” — so probably center.
- Gases (noble gases) are on the far right.
- Semiconductors (metalloids) have properties similar to both metals and non-metals.

So:
→ center
→ far right
→ similar

Wait — what about “far left”? We already said metals are on the left — but the sentence says “left and ______”, implying another area. Transition metals are in the center, so “center” is good.

Also, noble gases are on the far right — yes.

And “similar” is perfect for semiconductors.

Now, let’s double-check all blanks:

Blank 1: just over ___ → 50

Blank 2: details of their ___ → properties

Blank 3: revealed ___ → repeating pattern

Blank 4: order of ___ atomic number → increasing

Blank 5: number of ___ → protons

Blank 6: rows called ___ → periods

Blank 7: vertical column called ___ → groups

Blank 8: left and ___ → center

Blank 9: gasses on the ___ → far right

Blank 10: properties that are ___ → similar

Wait — we haven’t used “100”, “repeating patterns”, “far left” — but maybe they’re distractors? Or did we miss something?

Let’s re-read the first sentence: “Just over ___ elements” — if we put 100, that would be wrong because Mendeleev didn’t know 100 elements in 1869. So 50 is better.

“Repeating patterns” vs “repeating pattern” — the sentence says “revealed ___ in the chemical properties...” — grammatically, “a repeating pattern” is fine. But “repeating patterns” could also work if referring to multiple repetitions. However, in most textbooks, it’s “a repeating pattern”.

Also, “far left” — where would that fit? Maybe in the metals sentence? But it says “left and ___” — if we put “far left”, that would be redundant. So “center” is better.

Another possibility: maybe “metals are grouped on the left and far left”? No, that doesn’t make sense. Far left is part of left.

Perhaps the intended answer for metals is “far left” and “center”? But the blank is only one word after “and”.

Looking again: “Metals are grouped on the left and ______ of the periodic table.”

In many diagrams, metals occupy the left side and the center block (transition metals). So “center” is appropriate.

Gases: definitely “far right”.

Semiconductors: “similar” — yes.

Now, what about “100”? Not needed. “Repeating patterns” — perhaps if we used plural in blank 3? Let’s see: “revealed repeating patterns” — that could also be correct, meaning multiple instances of repetition. But typically, it’s referred to as “the periodic law” showing a repeating pattern.

However, looking at the word list, both “repeating pattern” and “repeating patterns” are given. Which one to choose?

In the context: “This table revealed ______ in the chemical properties...” — if we say “repeating patterns”, it might imply different kinds of patterns, but actually it’s one overarching pattern that repeats. So “repeating pattern” is better.

But let’s check online or standard phrasing: Usually, it’s “a repeating pattern of properties”.

I think “repeating pattern” is correct.

Now, for the last part — section B: Answer the following questions.

These require general knowledge:

① Which 3 elements are magnetic?

Common magnetic elements: Iron (Fe), Nickel (Ni), Cobalt (Co). Sometimes Gadolinium, but those three are the main ones taught in school.

② Which 2 elements are liquid at room temperature?

Mercury (Hg) and Bromine (Br). Mercury is metal, bromine is non-metal liquid.

③ Which element is used in batteries?

Many elements, but commonly Lithium (Li) in modern batteries, or Lead (Pb) in car batteries. But since it’s open-ended, Lithium is a safe answer. Alternatively, Zinc (Zn) in dry cells. But perhaps they expect “Lithium” or “Lead”. To be precise, let’s say Lithium as it’s very common now.

Actually, in many curricula, they mention zinc or lead, but lithium is also correct. Since the question doesn’t specify, I’ll go with Lithium.

But wait — perhaps they want a specific one. Another common one is carbon in some batteries, but no. Best to say Lithium.

Alternatively, nickel in NiCd batteries, but again, lithium is prominent.

To be safe, since it’s a basic worksheet, maybe they expect zinc? But I think lithium is fine.

Actually, let’s think: in primary/secondary school, they often teach that lead is used in car batteries, and lithium in phone batteries. But since it’s “an element”, any is fine. I’ll put Lithium.

④ Which is a significant element found in eggs?

Eggs contain protein, which has nitrogen, but also sulfur (in amino acids like cysteine). Also, calcium in shells, but the question says “found in eggs” — probably meaning the egg itself, not shell.

Significant element: Sulfur is key because of the smell when eggs rot (hydrogen sulfide), and it’s in proteins.

Also, phosphorus in yolks, but sulfur is more associated.

Actually, eggs are rich in selenium? No.

Standard answer: Sulfur — because egg whites contain sulfur-containing amino acids.

Sometimes calcium is mentioned for shells, but the question likely means the edible part.

Upon second thought, in nutrition, eggs are known for protein, which contains nitrogen, but nitrogen isn't typically highlighted as "significant element" in this context.

Another candidate: Iron — eggs have some iron, but not particularly high.

Actually, I recall that sulfur is the element responsible for the rotten egg smell, and it's present in eggs.

But let’s confirm: eggs contain sulfur in methionine and cysteine.

Perhaps phosphorus — egg yolks have phospholipids.

But I think the expected answer is Sulfur.

Alternatively, calcium if considering shells, but the question says “found in eggs”, which might include shells? Unlikely.

Looking at common worksheets, sometimes they say sulfur for eggs.

I’ll go with Sulfur.

But to be accurate, let’s think: what element is significantly associated with eggs? In biology, eggs are high in protein, and protein contains nitrogen, but nitrogen is everywhere.

Perhaps selenium? Eggs are a source of selenium.

But I think for school level, sulfur is acceptable.

Another idea: carbon — but too vague.

I found online that eggs contain sulfur, and it’s often mentioned.

So I’ll put Sulfur.

But let’s finalize:

For section B:

① Iron, Nickel, Cobalt

② Mercury, Bromine

③ Lithium (or Lead, but Lithium is modern)

④ Sulfur

Now, back to section A — we need to make sure all blanks are filled correctly.

List of blanks in order:

1. just over ___ → 50

2. details of their ___ → properties

3. revealed ___ → repeating pattern

4. order of ___ atomic number → increasing

5. number of ___ → protons

6. rows called ___ → periods

7. vertical column called ___ → groups

8. left and ___ → center

9. gasses on the ___ → far right

10. properties that are ___ → similar

Words used: 50, properties, repeating pattern, increasing, protons, periods, groups, center, far right, similar

Leftover words: 100, repeating patterns, far left — which are distractors.

Is “repeating patterns” possibly for blank 3? If we use “repeating patterns”, it might be acceptable, but “repeating pattern” is more standard.

In some contexts, they say “periodic patterns”, but here the options are given.

I think our choices are correct.

Now for section B answers:

① Magnetic elements: Iron, Nickel, Cobalt

② Liquid at room temp: Mercury, Bromine

③ Used in batteries: Lithium (commonly accepted)

④ Significant in eggs: Sulfur (due to protein content and characteristic smell)

But to be precise, let’s write them clearly.

Final Answer for section A blanks:

50, properties, repeating pattern, increasing, protons, periods, groups, center, far right, similar

For section B:

① Iron, Nickel, Cobalt

② Mercury, Bromine

③ Lithium

④ Sulfur

But the instruction is to provide the final answer after reasoning.

Since the user didn’t specify ExplainAnswer etc., and they are false, I just need to output the Final Answer.

But the Final Answer should include both sections.

How to format?

Probably list the filled blanks and then the answers to B.

Since it’s a worksheet, perhaps write the completed text or just the answers.

The instruction says: “Provide only the final correct answer”

But for fill-in-the-blank, it’s the words in order.

Similarly for B, the answers.

So I’ll write:

For part A, the blanks in order are: 50, properties, repeating pattern, increasing, protons, periods, groups, center, far right, similar

For part B:

1. Iron, Nickel, Cobalt

2. Mercury, Bromine

3. Lithium

4. Sulfur

But to match the format, perhaps list them as per the questions.

Since the user might expect the filled sentences, but that would be long.

I think providing the sequence for A and then B answers is fine.

Let me write the Final Answer accordingly.