Chemistry Quiz 2 (25 MCQs)

Quiz Instructions:

Select an option to see the correct answer instantly.

1. A reaction in which energy is given off or released.

2. Choose the best optionA substance that is highly reactive _____

3. Which of these electronic structures belongs to a noble gas?

4. Saltwater is classified as what type of matter?

5. Which group or family of the periodic table will not naturally form compounds with any atom?

6. Which substance is an element?

7. Molecular compounds are different from ionic compounds by _____

8. What is the acids of hydrochloric symbol is?

9. In about _____ John Dalton realized that all matter is composed of relatively few elements.

10. State of matter that has no definite shape and no definite volume

11. The building blocks of _____ are amino acids.

12. Water is the product of the reactants:

13. What is the term for combining 2 or more DIFFERENT atoms together?

14. What is the unit of mole fraction

15. Most elements are what phase at room temperature?

16. During the 18th and 19th century, scientists continued preparing lists of elements based on their.

17. It is an analysis directed towards improving the experimental methods used in the other areas of analytiacl chemistry.

18. Rows on the period table are called _____ while columns are called _____

19. The type of bond that forms when electrons are shared between two atoms is called _____

20. An atoms overall charge is

21. Calculation used to find the number of neutrons in an atom

22. Defintion of matter

23. Which of the following does the nucleus contain?

24. What is the mass percentage of Carbon in carbon dioxide (CO2)?

25. Found orbiting outside the nucleus, this subatomic particle has a negative charge.