Key takeaway
Ionic and covalent rules
Before you read
Test yourself first: 3 questions
Question 1 of 3
A pure substance that cannot be broken down into simpler substances is a(n):
Answer: B. An element is the simplest pure substance (e.g., oxygen, gold). Compounds can be broken into elements.
Question 2 of 3
Which of the following is an element?
Answer: C. Oxygen is an element (one type of atom). Water and salt are compounds; air is a mixture.
Question 3 of 3
Which describes a mixture rather than a compound?
Answer: A. Compounds are chemically bonded in fixed ratios and need a reaction to separate. Mixtures are physically combined and separate by filtering, settling or evaporating.
0/3
Keep the streak going with more questions like these, each with a full rationale.
Study Naming Compounds in the appTEAS 7 and HESI A2 question banks with a rationale on every answer and timed practice tests.See how CinnaEntry works
Start free Want more HESI Chemistry questions?We'll email you a free set on Naming Compounds. No account needed.
Was this helpful?