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Atomic Structure Basics

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Atomic Structure Basics

Atomic structure diagram

🔬 Part 1: Multiple Choice

1. What are the three main parts of an atom?

Protons, neutrons, and electrons

Nucleus, shell, and core

Positive, negative, and neutral

Small, medium, and large particles

2. Where are protons and neutrons located in an atom?

In the electron cloud

In the nucleus

Around the outside of the atom

Between the nucleus and electrons

3. Which particle has a negative charge?

Proton

Neutron

Electron

Nucleus

4. What makes one element different from another element?

The number of electrons

The number of protons

The number of neutrons

The size of the atom

✏️ Part 2: Fill in the Blanks & Short Answers

5. Complete the sentences about atomic structure:

a) The center of an atom is called the ______________.

b) ______________ have a positive charge and are found in the nucleus.

c) Electrons move around the nucleus in areas called ______________ or energy levels.

d) The atomic number tells us how many ______________ an element has.

6. Explain in 1-2 sentences why atoms are mostly empty space:
7. If an atom has 6 protons, 6 neutrons, and 6 electrons, what element is it? Use the periodic table to help you.

Element: ________________

8. Draw and label a simple diagram of an atom with 3 protons, 4 neutrons, and 3 electrons:

🧪 Part 3: Think Like a Scientist

9. Scientists cannot see individual atoms with regular microscopes. How do you think they learned about atomic structure?
10. True or False: Circle the correct answer and explain your reasoning.

All atoms of the same element are identical.

TRUE      FALSE

Explanation: _________________________________________________

_________________________________________________________

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