chemistry worksheet BI

Chemistry Review

1. Everything in the universe is made of __________________________________.

2. The measurement of the amount of matter in an object is called ___________________.

3. What are the 3 states of matter?


4. Charged particles that move around an atom’s nucleus are called ________________________.

5. Chemical bonds are broken, atoms are rearranged, and new bonds are formed during ___________________________  ______________________________.

6. Atoms with filled outermost energy levels tend _____________ to participate in chemical reactions.

7. A pure substance that cannot be broken down is called an ____________________.

8. The simplest part of an element is an ____________________.

9. The central core of an atom is called the _____________________________.

10. In an ionic bond, __________ atoms of ________________ charge are held together by _________________________ attraction.

11. The part of an atom that has a neutral charge is a _______________________.

12.  Most of the mass of an atom is found in the _____________________.

13. A pure substance made up of atoms of one or more elements is called a ____________________________.

14.  Most atoms tend to undergo ____________________  _________________, combining in ways that cause their atoms to become more ____________________.

15. When two atoms share one or more electrons, it is called ____________________________  ______________________.

16.   A bond formed by electrical attraction between two opposite charged ions is called ______________________  ____________________.

17.   The ability to do work or cause change is _____________________.

18.   A redox reaction involves the _____________________ of ___________________ between atoms.

19. The amount of energy needed to start a chemical reaction is the reaction’s _________________________  ___________________.

20. A substance that neutralizes small amounts of acids or bases added to a solution is a _______________________.

21. A chemical reaction that can proceed forward or backward is a ______________________  ______________________.

22.  Sodium chloride (table salt) is an example of a compound formed by ______________ _________________.

23.  The positive charge part of an atom is called a ___________________________.

24.   A particle composed of one or more atoms is a ________________________.

25.  Chemical reactions that release free energy are called ____________________________ ____________________________.

26.   Chemical reactions that absorb free energy are called ____________________________ _______________________________.

27.   The loss of one or more electrons is called ______________________.

28.   The gaining of one or more electrons is called _______________________.

29.   The breaking apart of water molecules into two ions of opposite charge is called ___________________________________.

30.   An atom has six electrons, what is it atomic number? ____________  Name?___________  It is a stable or unstable atom? _________________.

31.   Why is it necessary for oxidation and reduction reactions to occur in pairs?

32. What is the role of enzymes in chemical reactions occurring in living things?

33. Describe the relationship between the solute, the solvent, and the concentration of a solution.

34. List 2 characteristics of acids and 2 characteristics of bases.

35.  What is the pH Scale, and what does its range of values mean?