Warm-Up: 1. Convert 14 km to meters 2. Convert 455 ml to liters

1. Warm-Up: 1. Convert 14 km to meters2. Convert 455 ml to liters

2. Practice:1. 1285 ml to L2. 19.78 km to m3. 89234 m to km4. .00564 km to m5. 190 cm to m6. 2423.232 mm to m7. 1800 g to kg8. 5343 hg to g9. 4.545 L to ml10. 2 days to seconds

3. Notes:Matter

4. Matter is anything that has mass and takes up space.

5. An atom is the smallest particle into which an element can be divided and still be the same substance.

6. If you lined up 70 million atoms, they would stretch across your pencil eraser.

7. A piece of paper is 1 million atoms thick.

8. An atom’s nucleus is its center.The nucleus contains protons and neutrons

10. The atom is mostly empty space. Think of a baseball inside of Turner Field.

11. The number of protons determines the element’s identity

13. Warm-Up: 1. What is the “building block of matter?”2. The number of ______ in the ______gives each element its identity.

14. Number of protons = Atomic Number

15. Electrons are negatively charged particles in the electron cloud

18. Electrons “orbit” in electron shells

19. Energy Level # of electrons 1 2 2 8 3 18 4 32

20. The number of the period (row) an element is in, is the same as the number of shells it has

21. The first shell needs to be full before the second shell gets any electrons.

22. The last, or outer, shell is called the VALENCE SHELL.The electrons in the valence shell are called valence electrons

23. The number of valence electrons determines reactivity

24. Warm-Up:1. How many valence electrons does carbon have?2. How many valence electrons does sodium have?3. How many valence electrons does chlorine have?

25. Isotopes have different numbers of neutrons in the nucleus

26. Atomic Mass: Average Mass of all isotopes in nature of that element

27. Mass Number: Number of protons and neutrons in the atom

28. A covalent bond happens when atoms share electrons

29. Warm-Up:1. How many electrons can fill the first shell of an atom? How many can fill shells 2 & 3?2. What is the valence shell?3. Draw a oxygen atom

30. Molecules are made of multiple atoms chemically joined together.

31. Covalent bonds occur when atoms SHARE electrons

32. Covalent bonds usually happen between nonmetals

33. An ionic bond is between a metal and nonmetal

34. An ionic bond happens when electrons are transferred between atoms. This results in a positive ion and a negative ion.

37. When atoms join to form molecules, they create a new substance with unique properties

38. The new substance is a compound Sugar: C12H22O11

39. Warm-Up:1. Which subatomic particles move around the nucleus? 2. What makes atoms of elements different from one another?3. How many atoms of each element does this formula have? 2H2O2

40. Identifying Compounds • Each new element is identified by a capital letter • Example: H2SO4 • The elements in Sulfuric Acid • Hydrogen • Sulfur • Oxygen

41. Subscripts • C12H22O11 • There are 12 atoms of Carbon • There are 22 atoms of Hydrogen • There are 11 atoms of Oxygen • If there is not a subscript listed, it is understood to be 1. • Example: NaCl • There is one atom of Sodium • There is one atom of Chlorine

42. NaHCO3 HCl

43. There are times you will see a compound with parenthesis. Pb(NO3)2 So, in counting the atoms, you would have the following: Lead – Oxygen - Nitrogen -

44. (NH4)3PO4 Mg(OH)2

45. Coefficient 2H2SO4 This means there are 2 compounds of Sulfuric Acid. Think: H2SO4 H2SO4 Counting the atoms: Hydrogen – Sulfur – Oxygen -

46. 3H3PO4 2H2O

47. On the Periodic Table,Rows are called periods

49. On the Periodic Table,Columns are called groups

50. Groups often have similar properties