The HESI A2 exam is a crucial step for pre-nursing students. Among its many sections, the Chemistry part often intimidates many. Fear not! This blog post is your ultimate guide to mastering the HESI A2 Chemistry Diagnostic Test, packed with 25 essential questions to test your knowledge and boost your confidence.
Why HESI A2 Chemistry Matters
The Chemistry section of the HESI A2 exam evaluates your understanding of fundamental chemical concepts crucial for a career in nursing. A strong performance here can set the tone for your entire nursing school application.
Know the HESI A2 Chemistry Section
The HESI A2 Chemistry exam section consists of 25 questions that cover a variety of topics. From basic principles to more complex concepts, these questions are designed to test your readiness for nursing school.
Key Chemistry Concepts to Know
Atomic Structure
Knowing the basic structure of an atom—protons, neutrons, and electrons—is foundational. Understand how these subatomic particles interact to form atoms and molecules.
Chemical Bonding
Be familiar with ionic and covalent bonds. Recognize how these bonds form and their significance in chemical reactions.
Periodic Table
The periodic table is a vital tool. Make sure you can interpret it and understand the trends, such as electronegativity and atomic size.
Effective Study Strategies
Utilize Practice Tests
Taking practice tests can familiarize you with the format and types of questions you’ll encounter. They can also help identify areas where you need further study.
Flashcards for Memorization
Flashcards can be particularly useful for memorizing key terms and concepts. Write down definitions, important equations, and example problems.
Group Study Sessions
Studying with peers can provide additional insights and explanations. You can also quiz each other on difficult topics.
Common Pitfalls and How to Avoid Them
Overcomplicating Simple Concepts
It’s easy to overthink questions. Stick to what you know and avoid reading too much into the question.
Ignoring Weak Areas
We all have weak spots. Identify them early and focus your study efforts there to improve your overall score.
Not Timing Your Practice Tests
Time management is crucial. Make sure to take timed practice tests to get used to the pace you’ll need on the real exam.
Hesi a2 Chemistry Practice Test 25 Question And Answer
1) Sterling silver contains 92.5% silver and 7.5% copper by weight. Which term applies to sterling silver?
- Amalgam
- Emulsion
- Alloy
- Compound
Correct answer: Alloy
2) What is the chemical formula for sodium chloride?
- NaCl
- HCl
- AlCl3
- CCl4
Correct answer: NaCl
3) Which of the following elements has a full outer energy level and does not readily form chemical bonds?
- Sodium (Na)
- Potassium (K)
- Helium (He)
- Lithium (Li)
Correct answer: Helium (He)
4) What is the chemical symbol for iron?
- Fe
- Is
- Ir
- Fm
Correct answer: Fe
5) Which of the following is a compound?
- Oxygen (O)
- Argon (Ar)
- Water (H2O)
- Neon (Ne)
Correct answer: Water (H2O)
6) Which of the following would be considered a noble gas?
- Helium (He)
- Carbon (C)
- Oxygen (O)
- Fluorine (F)
Correct answer: Helium (He)
7) Which element is commonly used to make pencils?
- Carbon (C)
- Iron (Fe)
- Gold (Au)
- Lead (Pb)
Correct answer: Carbon (C)
8) A mixture contains two or more substances that are not chemically combined. What type of mixture is this?
- Homogeneous
- Heterogeneous
Correct answer: Heterogeneous
9) Which of the following is an example of a homogeneous mixture?
- Salt water
- Trail mix
- Sand and gravel
- Oil and vinegar salad dressing
Correct answer: Salt water
10) What type of change happens to matter when it undergoes a physical change?
- It becomes a different substance.
- The atoms rearrange into new molecules.
- The chemical bonds are broken and reformed.
Correct answer: It becomes a different substance.
11) Which state of matter has definite volume but no definite shape?
- Solid
- Liquid
- Gas
Correct answer: Liquid
12) Which of the following is an example of a chemical change?
- Melting ice to form water
- Cutting a piece of paper into smaller pieces
- Burning wood to form ash and smoke
Correct answer: Burning wood to form ash and smoke
12) In which state of matter do molecules have the most energy and move freely in all directions?
- Solid
- Liquid
- Gas
Correct answer: Gas
14) Which of the following is an example of a physical property?
- Flammability
- Reactivity
- Density
Correct answer: Density
15) What is the process called when a solid changes directly into a gas without first becoming a liquid?
- Sublimation
- Condensation
- Melting
Correct answer: Sublimation
16) Which of the following best describes an exothermic reaction?
- Heat is absorbed from the surroundings.
- Energy is released to the surroundings.
Correct answer: Energy is released to the surroundings.
17) What type of reaction occurs when an acid and base are combined?
- Combustion
- Synthesis
- Neutralization
Correct answer: Neutralization
18) Which of the following describes a solution?
- A mixture with particles that settle over time.
- A mixture in which one substance dissolves into another.
Correct answer: A mixture in which one substance dissolves into another.
19) How many protons does an atom of hydrogen have?
- 1
- 2
- 3
Correct answer: 1
20) Which of the following elements is commonly used in batteries?
- Sodium (Na)
- Zinc (Zn)
- Aluminum (Al)
Correct answer: Zinc (Zn)
21) What is the atomic number of carbon?
- 6
- 12
- 24
Correct answer: 6
12) What type of bond involves the sharing of electrons between atoms?
- Ionic
- Covalent
Correct answer: Covalent
23) Which group of elements on the periodic table are known as the “alkali metals”?
- Group 1
- Group 2
- Group 17
Correct answer: Group 1
24) What is the chemical symbol for gold?
- Au
- Ag
- Al
Correct answer: Au
25) What is the process called when a gas changes directly into a solid without first becoming a liquid?
- Deposition
- Condensation
- Sublimation
Correct answer: Deposition
As you can see from the sample questions, these types of questions cover a wide range of topics related to chemistry. Some focus on basic concepts such as chemical symbols and elements, while others delve into more complex ideas like physical and chemical changes. It’s important to have a strong understanding of these fundamental principles in order to succeed in your chemistry studies.
Resources for Further Study
- Textbooks: Don’t underestimate the power of traditional textbooks. They provide thorough explanations and plenty of practice problems.
- Online Courses: Websites like Khan Academy offer free chemistry courses that can supplement your study routine.
- Study Apps: Apps such as Quizlet or Anki are great for on-the-go studying and can help reinforce your memory.
Frequently Asked Questions
How many questions are on the HESI A2 Chemistry section?
There are 25 questions, each designed to test your understanding of key chemistry concepts.
How should I allocate my study time?
A balanced study schedule that covers all topics is ideal. Focus more on areas where you feel less confident.
Is it necessary to memorize the periodic table?
While you don’t need to memorize the entire table, understanding its layout and trends is crucial.
Final Thoughts
Mastering the chemistry hesi a2 practice test is a key step in preparing for your HESI A2 exam. As you continue to study, make sure to review the concepts and topics covered in this guide. With dedication and practice, you can ace the chemistry section and feel confident on exam day.