Compounds vs Their Elements

Lab Brief #4

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

If it bubbles, something invisible is escaping.

What you'll learn

A compound's properties differ from its elements. Sodium is a reactive metal and chlorine is a toxic gas, but together they form sodium chloride—common table salt.

Key words

isotope
A form of an atom with the same protons but different neutrons.
chemical bond
The force that holds atoms together to make a substance.

Make a hypothesis first

Guess: will the fizz be loud, soft, or none at all?

Say your guess out loud — then find out if you were right.

Get ready

🧰 What you need

sugar

Get ready

⚠️ Safety first

Adult supervision required for any heating. Hot glassware looks identical to cold — use tongs.
Mop up spills straight away so nobody slips, and keep liquids away from sockets.

Step 1 of 4 · Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 of 4 · Do

Test how temperature affects dissolving: dissolve sugar in cold, warm, and hot water. Count stirs needed for each and create a data table.

Step 3 of 4 · Observe

Draw a detailed diagram of what you observe.

Step 4 of 4 · Record

Write a conclusion: what did your results show? Did they match your prediction?

Question 1 of 3

What is a compound?

How sure are you?😐 maybe

Question 2 of 3

How is a compound different from a mixture?

How sure are you?😐 maybe

Question 3 of 3

What is the smallest unit of an element?

How sure are you?😐 maybe

Mind = blown

💧 Hot water can freeze faster than cold water under the right conditions. Nobody fully understands why.

Nice work!

You got 0 of 3 right.

Next: Phase Diagrams All lessons

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✨ More to explore

🌍 Where you see this in real life: Your toothpaste, your soap, even your breakfast involves this.

🏆 Stretch challenge (try it this week): Ask a grown-up to help you mix two safe kitchen things. Predict what will happen first.

👨‍👩‍👧 For the dinner table: “What's something we cook that mixes things together this way?”

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