1. Atomic Systems Review

2. __________________ is anything that has mass and takes up space matter

3. The tiniest particles of which all things are made are ____________. atoms

4. The basic structural components of the typical atom are ___________, _________, and _____________. Protons, neutrons, electrons

5. Protons and neutrons comprise the _____________ of an atom. nucleus

6. ______________ have a positive charge. protons

7. _____________ have a negative charge. electrons

8. _______________ have no charge at all. neutrons

9. An ______________ is a form of matter that is made up of one type of atom element

10. The number of __________ in an atom of an element determine the type of element. protons

11. A(n) _____________ of an element contains a different number of neutrons. isotope

12. The ___________________ organizes the elements by atomic mass. Periodic table

13. Every element is represented by its __________________. Chemical symbol

14. The __________________ indicates the number of protons and electrons in element. Atomic number

15. The ________________ of an element tells the weighted average mass of its isotopes. Atomic mass

16. Use the information on the left to determine the chemical symbol for the element. 6CCarbon12.0107 C

17. How many protons are contained in one atom of carbons? 6CCarbon12.0107 6

18. How many neutrons are contained in one atom of carbon? 6CCarbon12.0107 6.0107

19. How many electrons are contained in one atom of carbon? 6CCarbon12.0107 6

20. The periods of the periodic table tell the number of _____________ an element has. shells

21. _____________ are malleable and ductile, generally shiny and good conductors of heat and electricity, and most are solid at room temperature. metals

22. ________________ have characteristics of both metals and nonmetals. metalloids

23. ______________ are usually dull in appearance, most are poor conductors of heat and electricity, and many are gases at room temperature. nonmetals

24. Two or more atoms of the different elements may combine to form a ______________. compounds

25. What is the chemical formula for salt? NaCl

26. The chemical formula, H 2 O 2 contains what two elements? Hydrogen and Oxygen

27. The chemical formula, NaHCO 3 contains how many atoms of oxygen? 3

28. The chemical formula, CaCO 3 contains how many atoms of calcium? 1

29. A chemical formula represents a _____________ reaction of the elements involved. chemical

30. The properties of a ___________ are different from those of the elements it is made from. compound

31. When two or more substances (elements or compounds) come together but don’t combine to make a new substance, a ____________ results. mixture

32. _________________ mixtures are the same throughout. homogeneous

33. You can see the different parts in a _____________ mixture.

34. The compounds in yellow represent which part of the chemical equation? SO 3 + H 2 O H 2 SO 4 reactants

35. The compounds in red represent which part of the chemical equation? SO 3 + H 2 O H 2 SO 4 product

36. Is the following chemical equation balanced? 2H 3 AsO 4 → As 2 O 5 + H 2 O no

37. Don’t forget to study common compounds, balancing chemical equations, and predominant earth elements.