STAAR Reporting Category 1 Matter & Energy

1. STAAR Reporting Category 1Matter & Energy Middle School Science Science STAAR Need to Know STAAR Need to Know

2. Metalloids (have some properties of metals and some properties of non metals) Claim:

3. Metals Nonmetals 1.Malleable (broken 1. not malleable into thin plates) (brittle, break easily) 2. Ductile (made into 2. not ductile thin wires) 3. Good conductors 3. poor conductors of of heat and electricity heat and electricity 4. metallic shine 4. no (rarely) metallic or luster shine or luster 5. Easily looses 5. easily gains electrons electrons

4. PCES The element sulfur has an atomic number of 16, and an atomic mass of 32. It is on the right of the zig-zag on the periodic table. Based on this information, to which class of elements does sulfur most likely belong? A. metals B. metalloids C. nonmetals D. solids

5. Problem: Is sulfur a metal, non metal, or metalloid?

7. metalloids Claim:

8. Scientific Explanation: Sulfur is a non metal based on location and properties.

9. Metals Metalloids Non metals Group 18 is called Noble Gas. They do not react with other elements

10. Properties of Metals Nonmetals 1.Malleable (broken 1. not malleable into thin plates) (brittle, break easily) 2. Ductile (made into 2. not ductile thin wires) 3. Good conductors 3. poor conductors of of heat and electricity heat and electricity 4. metallic shine 4. no (rarely) metallic or luster shine or luster 5. Easily looses 5. easily gains electrons electrons

11. PCES How many atoms are represented in the formula CaCO3? A. three B. four C. five D. six

12. Problem: How many atoms are represented in the formula CaCO3?

13. Claim:

14. Scientific Explanation: atoms in CaCO3 Ca = 1 C = 1 O3 = 3 Total = 5

15. Journal Entry – Case One Calculate the number of oxygen atoms of the molecule represented in the following formula: 4Al2(SO4)3 Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

16. Problem: Calculate the number of oxygen atoms of the molecule represented in the following formula: 4Al2(SO4)3

17. 4Al2(SO4)3

18. Claim:

19. Scientific Explanation: Oxygen atoms in 4Al2(SO4)3 = coefficient x subscript = coefficient x (bracketed subscript x subscript) = 4 x ( 3 x 4) = 4 x 12 = 48

20. Case Two REACTANTS PRODUCTS _____Al + ____ CuSO4 _____Al(SO4)3 + _____Cu The equation above is an unbalanced equation. Find the coefficients that will balance the following reaction. Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

21. Problem: Find the coefficients that will balance the reaction.

22. Scientific Explanation: Formula number = coefficient x subscript of atoms

23. Reactants Al + 3CuSO4 Al = 1 atoms Cu = 3 atoms S = 3 atoms O = 12 atoms

24. Products 1Al(SO4)3 + 3Cu Al = 1 atoms Cu = 3 atoms S = 3 atoms O = 12 atoms

25. REACTANTS PRODUCTS 1Al + 3CuSO4 1(SO4)3 +3Cu Al + 3CuSO4 (SO4)3 + 3Cu

26. subatomicchargelocation particles _______________________________________ proton+inside nucleus _______________________________________ neutron no charge inside nucleus (neutral) _______________________________________ electron-in electron cloud _______________________________________

27. Atomic Theory • Atoms are building blocks of elements • Atoms in each unique element are the same. (Ex: Every oxygen element has the same # of protons) • Atoms are different from atoms of other elements (Ex: Hydrogen has a different # of protons than oxygen) • Two or more different atoms bond in simple ratios to form compounds (Ex: Hydrogen & oxygen can chemically combine to form water- H2O ) STAAR Need to Know

28. Metals Metalloids Nonmetals Group 18 is called Noble Gas. They do not react with other elements

29. Properties of Metals Nonmetals 1.Malleable (broken 1. not malleable into thin plates) (brittle, break easily) 2. Ductile (made into 2. not ductile thin wires) 3. Good conductors 3. poor conductors of of heat and electricity heat and electricity 4. metallic shine 4. no (rarely) metallic or luster shine or luster 5. Easily looses 5. easily gains electrons electrons

30. Physical properties of METALS good conductor of heat • . shiny- high luster

31. Physical properties of METALS Good conductor of electricity • . malleable – beaten into thin plates Ductile – drawn into thin wires

32. Physical Properties of NONMETALS no luster Brittle – break easily not good conductors of heat

33. STAAR Need to Know

34. Test Your Understanding Who am I?

35. 1.I am positively charged particle of an atom.

36. proton

38. 2.I am negatively charged particle of an atom.

39. electron

41. 3.I am neutrally charged particle of an atom.

42. neutron

44. 4. We are found in the nucleus of an atom.

45. proton and neutron

47. We are the three subatomic particles of an atom.

48. proton, neutron, and electron

50. An atom has no charge because………