Atoms are the basic building blocks of chemistry. They are the smallest unit which matter can be divided into without releasing electrically charged particles.

Scientists have a number of ways for describing the structure of atoms. In this article, we’ll focus on one of those models: the Bohr model, which was first proposed by Niehls Bohr in 1913.

In this article, we’ll explain what the Bohr atomic model is, give a Bohr diagram for the first element, as well as provide information for the 20 elements on the periodic table, and explain how the Bohr model is used.

If you’re raising a toddler, you’re probably used to the tantrums, the nursery rhymes, the same old bedtime stories. But have you ever thought about spicing up your routine with some crafts? There are so many fun and easy crafts for toddlers, and we introduce some of the best here.

Keep reading to learn how crafts for toddlers can have tons of developmental benefits and to take a look at our list of 21 exciting preschool crafts.

If you or your kids are feeling creative, crafts are the absolute best activity to do. But what kinds of crafts for kids are there? You’d be surprised at the options that await you! Here, we'll explain the different benefits of crafts and the basic materials you’ll typically need before giving you a list of 32 fun and easy DIYs for kids.

Adverbs are an important part of sentences that describe and modify other parts of the sentence. Verbs are words that describe an action, and adverbs provide description and details regarding that action. There are different types of adverbs and how we use them depends on what you’re describing, and how you want to describe it. This adverbs list has over 100 adverb examples, and they are categorized by type with adverb examples sentences in order to help you understand their uses and meanings.

Verbs are one of the eight main parts of speech, and we can't form sentences without them. A verb explains the action of a sentence, but that’s just one part of what verbs do.

Use this guide to familiarize yourself with the types of verbs and what they do, and peruse this list of nearly 300 common verbs. There are over 1000 possible verbs you can use in the English language, and I’m sure you’ll recall using some verbs on these lists more than others. This verbs list includes example sentences to help you expand your vocabulary and gain a better understanding of verb words and what they do.

Verbs are one of the two essential parts of a sentence, along with nouns. You need both a noun and a verb to make a complete sentence.

In this article, we’ll explain what is a verb and how a verb functions in a sentence. You’ll also get to practice determining what the verb in a sentence is and what the different types of verbs are.

If you’re studying chemistry, you’ll likely learn about electronegativity. In this guide we’ll break down everything you need to know about electronegativity: what it is, why it matters, how it’s measured, and trends for electronegativity on the periodic table.

Are you considering applying for federal financial aid? If so, you might have heard of the Perkins loan program. Perkins loans are government-backed, low-interest loans that are meant to help students pay for school. They come with a lot of great perks, including the opportunity for loan cancellation (that's exactly what it sounds like it is⁠—imagine taking out a loan for school and not having to pay it back!).

If you want to get a Perkins loan for yourself, you've come to the right place. Read on for easy-to-follow instructions on exactly how to apply for a federal Perkins loan.

Note: As of 2017, the Perkins loan program is no longer being run. But don't worry⁠—we'll still give you a few options for what you can do for aid instead!

Taking the 2019 PSAT? Then you’ll want to have a decent grasp of what a good PSAT score for 2019 is. There are three main ways you can define good 2019 PSAT scores: (1) using percentiles, (2) using National Merit score cutoffs, and (3) based on the SAT scores you’ll need for colleges.

In this guide, we start by going over how PSAT scoring works and the most important information you'll see on your PSAT score report, from scores and subscores to percentiles. Then, we dive into our three definitions of what good 2019 PSAT scores are.

There are a lot of different ranking systems out there for almost any type of college you can imagine. Even though these rankings purport to use sophisticated algorithms and calculations, all the final lists seem to differ from each other. How should you be able to figure out what the best liberal arts colleges are when there so many different ranking systems out there?

I did the work for you by considering many of the top lists and compiling rankings of liberal arts colleges; in the beginning of this article, I'll lay out how exactly these ranking systems work. If you're looking for a realistic, reliable ranking list for the best liberal arts colleges in the country, then you're in luck.

Controversial topics are a good choice for an essay or debate because they immediately draw in the reader or listener. The adage that “controversy sells” is so rooted in society that even the rapper Chamillionaire named his second album after it! Controversial issues are also a good topic because it’s easier to write a strong thesis and find sources to back up your argument. After all, when something is controversial, everybody wants to have their say over it.

However, it’s also important that you address controversial issues with sensitivity and care. Because controversial topics tend to raise emotions, you must walk a thin line between opinion and fact in order to build trust between you and your reader/listener.

In this article, we’re going to give you the best controversial topics you can use for essays and debates—and we’ll explain the controversies for you, too! We’ll also discuss when to use controversial topics, the pros and cons of choosing a controversial issue, and tips for making sure you’re treating a controversial topic with sensitivity and respect.

That’s a lot to cover, so let’s get started!

What makes someone a “good” writer? While there are lots of answers to that question, one thing most great writers do is vary their sentence structure. They mix long, flowing sentences with short, powerful ones to communicate their points. 

But don’t worry: you can learn to do this, too! It starts with understanding different types of sentences and their structures. One type of sentence you’ve probably heard of that can add variety and depth to your writing is a complex sentence. But what are complex sentences, exactly? 

We’re here to help you understand exactly what complex sentences are and why they’re important by covering the following in this article: 

• Answering the question, “What is a complex sentence?”
• Discussing when to use complex sentences
• Reviewing the different parts of complex sentences 
• Explaining the difference between complex sentences, compound sentences, and compound-complex sentences 

Ready to become a complex sentence wizard? Then let's get started!

What is a compound sentence? How does it differ from a complex sentence? And there are compound-complex sentences, too? Don’t worry, we’ll help you keep them all straight! Read this guide to learn what a compound sentence is, what the different types of compound sentences are, what compound sentence examples look like, and what other sentence types you should know.

Garden gnomes. They might be your favorite decoration or your biggest pet peeve. Garden gnomes are small ornamental statues, typically resembling humans. Garden gnomes have been the subject of cultural fixation, reverence, and scorn, but have stayed an essential part of garden decor and more, even as debates raged about their purpose and pranksters tried to snuff them out. No matter what side of the garden gnome debate you’re on, learning the garden gnomes history is fun and enlightening.

If you’re applying to colleges, you need to know the upcoming SAT test dates for 2019 - 2020! Knowing these dates in advance, even if you’re not quite ready to take it yet, gives you all the more time to prepare and prep for your test, and in the SATs, prep is everything.

This article covers the SAT dates for 2019 and 2020, throughout the 2019 to 2020 school year. You can find the previous year’s test dates here, or dates for the future here!