D425 Introduction to Chemistry appears in the first term of WGU's pre-nursing path in the Bachelor of Science in Nursing (Prelicensure) guidebook, and carries 3 competency units.
The guidebook describes opportunities to examine atomic structure, periodic trends, molecular structure, functional groups, balanced equations, reaction types, intermolecular forces, and acids, bases and buffers.
Many students returning to study after years away find chemistry intimidating. It rewards a small set of habits: visualizing structures, working calculations in a fixed order, and linking each idea back to the body and to medicine.
Course at a Glance
| Item | Details |
|---|---|
| University | Western Governors University (WGU) |
| Course code | D425 |
| Program link | Listed in term 1 of the pre-nursing path of the prelicensure BSN guidebook |
| Competency units | 3 (per the guidebook) |
| Level | Undergraduate, competency-based and self-paced |
| Subject area | General and introductory chemistry |
What D425 Covers
The guidebook lists four competencies:
| Competency (summarized) | What it means in practice |
|---|---|
| Determine electronic structure of atoms and periodic trends | Electron configurations, and how properties change across the periodic table |
| Explain how bonds and electron orientation affect molecules | Ionic and covalent bonding, shapes, polarity and how structure explains behavior |
| Use chemical equations to calculate quantities in a reaction | Balancing equations and working with moles and amounts |
| Identify properties of acids, bases and buffer systems | pH ideas, strong and weak acids, and how buffers resist change |
Key Concepts Explained
Balancing and Using Equations
A balanced equation has the same number of each type of atom on both sides. Once balanced, the coefficients give mole ratios that let you work out how much of one substance reacts with or forms from another.
Example: For 2 H2 + O2 gives 2 H2O, the ratio of hydrogen to water is 2 to 2, so 4 mol of hydrogen can form 4 mol of water if oxygen is not limiting. The ratio of oxygen to water is 1 to 2, so 3 mol of oxygen can form up to 6 mol of water.
Polarity and Intermolecular Forces
Unequal sharing of electrons makes some molecules polar. Polarity and shape decide the forces between molecules, such as hydrogen bonding, and explain properties like why water dissolves salts and sugars. This idea returns in nutrition and pharmacology later.
Acids, Bases and Buffers
Acids release hydrogen ions in water and bases accept them. A buffer is a mixture of a weak acid and its conjugate base that resists changes in pH. Blood is a standard example and shows why this topic matters in health.
Typical Work and How to Approach It
The guidebook does not list assessment formats for D425, so check your course page. Chemistry courses generally test the following:
| Work type | What it tests | How to approach it |
|---|---|---|
| Atomic structure questions | Electron configuration, trends | Learn the order of filling and the direction of each trend |
| Bonding and shape | Structure and polarity | Draw Lewis structures, then decide shape and polarity |
| Stoichiometry | Calculation method | Balance, convert to moles, use the ratio, convert back |
| Acids, bases, buffers | Concepts and simple pH ideas | Identify the acid and base, then reason about direction of change |
Self-Check Questions for D425
Try these before you move to the next competency.
- Can you write the electron configuration of a simple element and say how its position predicts behavior?
- How does the type of bond affect melting point and solubility?
- Can you balance a combustion equation and calculate the moles of product from a given amount of reactant?
- What makes a solution a buffer, and why does it resist pH change?
- How does polarity explain why oil and water do not mix?
Write out your working in full. If you cannot explain each line, you will find the next problem harder.
Pacing Your Study
Work through the four competencies in order, because bonding builds on atomic structure and equations build on both. Practice calculations a little each day, and reserve time at the end for acids, bases and buffers, which many students find new.
Where Students Get Stuck
- Unit conversions. Write units on every line and cancel them.
- Balancing equations. Balance one element at a time, leaving hydrogen and oxygen until last.
- Visualizing shapes. Build models or draw them; do not rely on memory alone.
- Buffer logic. Think of it as a reservoir that absorbs added acid or base.
Study Tips for D425
- Do many short practice problems rather than rereading explanations.
- Keep a formula and trend sheet that you write yourself.
- Connect each topic to a health example, such as blood buffering.
- Move on only when you can explain a competency without notes.
How We Help with D425
Send the topic, the practice problem and your attempt. A science tutor-writer can explain atomic structure, equations or acid-base ideas, prepare worked examples for study, or check your own working and notes. For nursing coursework later in your program, see our nursing assignment help guide.
GradeEssays is independent of Western Governors University and not affiliated with it. We do not take exams or assessments, or access course portals. Use our work as a study aid and submit your own under WGU's academic integrity policy. Orders are written from scratch, with free revisions within the scope of your original request and a full refund if late.
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Frequently Asked Questions
The guidebook we reviewed lists it in the pre-nursing path of the prelicensure BSN. Other WGU programs may use it too, so check your own degree plan.
The guidebook lists 3.
Atomic structure and periodic trends, bonding and molecular structure, balanced equations and quantities, and acids, bases and buffers.
There is some calculation, especially with moles and equations, but the method is repeatable. Practice it until it becomes routine.
WGU courses are competency-based and self-paced, so you move on when you show proficiency. Your course page explains how it is assessed.
No. We provide tutoring, worked explanations and feedback. You must complete your own assessments.