Chemical Attributes Practice Questions

Sure, here are the practice questions on 'Chemical Attributes' tailored for a student studying Science in MYP-2:

1. **Define and differentiate between pure substances and mixtures.**
- Question: What is a pure substance? How does it differ from a mixture?
- Answer: A pure substance is a substance made of only one type of atom or molecule, while a mixture contains two or more different substances physically combined.

2. **Explain the characteristics of homogeneous and heterogeneous mixtures.**
- Question: What is the difference between homogeneous and heterogeneous mixtures?
- Answer: In a homogeneous mixture, the components are evenly distributed and not visibly distinguishable, like saltwater. In a heterogeneous mixture, the components are not uniformly mixed and can be distinguished, like a salad.

3. **Discuss the differences between compounds and elements.**
- Question: How do compounds differ from elements?
- Answer: Elements are pure substances made of only one type of atom, while compounds are substances made of two or more different types of atoms chemically bonded together.

4. **How do atoms and molecules differ from each other?**
- Question: What distinguishes atoms from molecules?
- Answer: Atoms are the smallest units of an element that retain its properties, while molecules are formed when two or more atoms chemically bond together.

5. **Describe the structure of the periodic table and the information it provides.**
- Question: What information does the periodic table provide about elements?
- Answer: The periodic table organizes elements based on their atomic number, symbol, and atomic mass, showing trends in properties and allowing predictions about element behavior.

6. **What are subatomic particles, and what is their charge?**
- Question: Name the subatomic particles and their charges.
- Answer: Subatomic particles include protons (+1 charge), neutrons (no charge), and electrons (-1 charge).

7. **Explain the concept of nucleons and how they relate to the proton number.**
- Question: How do nucleons relate to the proton number in an atom?
- Answer: Nucleons are particles found in an atom's nucleus, comprising protons and neutrons. The proton number indicates the number of protons in an atom.

8. **When do atoms reach stability, and what factors contribute to it?**
- Question: What factors contribute to an atom reaching stability?
- Answer: Atoms reach stability when their outermost energy level is full, achieved by gaining, losing, or sharing electrons to attain a stable electron configuration.

9. **Define electronic configuration and its significance in chemistry.**
- Question: What is electronic configuration, and why is it important in chemistry?
- Answer: Electronic configuration refers to the arrangement of electrons in an atom. It determines an element's chemical properties and reactivity.

10. **Identify and explain the characteristics of periods and groups in the periodic table.**
- Question: What are periods and groups in the periodic table, and how do they differ?
- Answer: Periods are rows and groups are columns in the periodic table. Elements in the same group share similar properties, while elements in a period have increasing atomic numbers.

These questions aim to deepen your understanding of the fundamental concepts in chemistry. Feel free to explore and ask more questions if you need further clarification!