The "False" questions and the explanations are as below.

3) The heat is not generated, but is from the energy stored in the chemical bonds of the candle.

4) The candle changes into carbon dioxide and water.

7) Ice and water are the same thing!

9) oxygen by weight, hydrogen by atom (How much water is in our body?)

10) O2

11) except inert gases

12) 1H2 and “1/2” O2

13) Nothing to do with temperature!

14) which can absorb more heat, therefore smaller temperature change.

16) The one with higher specific heat capacity (SHC) requires more heat to increase by the same temperature as the one with smaller SHC.

17) just one digit for the “estimated digit”

18) accuracy may be off!

20) Sugar, water, and carbon dioxide are three different molecules, thus chemical change.

22) for both

24) Mass never changes, weight changes with gravitational pull.

26) the number of proton

28) It’s a combinations of many quantized light energies.

29) Remember to follow the periodic table, then you won’t mess up!  Therefore, 4s is filled before 3d.

30) The nucleus is positively charged because of proton.

31) How about the 3s orbital of Na?

33) Two electrons in 1s orbital and 1 electron in 2s orbital.

34) 14 electrons

36) according to the properties of elements

37) How about Na, N, Fe, and many others?

38) See 29.

40) Gaseous state!

46) Can be removed if sufficient energy is provided.

47) There is no radiation in MRI!

49) Different mass numbers but same atomic number.

50) Many are not, like C-13, O-17, O-18 etc.

51) How about nuclear reaction?

52) still has 1/2100 of the original amount left.

53) How about losing one more electron from Na+ to form Na2+?

55) Has very high energy.

56) It is a electromagnetic wave of high energy, not a particle like the others.

57) See 31.

58 and 59 should be combined, and is true statement.

61) tetrahedral geometry

63) Both contribute.

 

Multiple choice question:

1) 4             2) 3             3) 1             4) 3             5) 4             6) 3             7) 4             8) 2             9) 2             10) 3         

11) 3          12) 4          13) 3          14) 4          15) 3          16) 3          17) 4          18) 5          19) 3          20) 3         

21) 4          22) 3          23) 3          24) 4          25) 4          26) 2          27) 1          28) 4          29) 1          30) 1         

31) 3          32) 5          33) 2          34) 3          35) 2          36) 4          37) 2          38) 1          39) 3          40) 5         

41) 5          42) 3          43) 5 (Si; P; Se; Co)                  44) 1          45) 4          46) 1          47) 4          48) 5         

49) 3          50) 4          51) 4          52) 3          53) 2          54) 4          55) 4          56) 4          57) 2          58) 4         

59) 3          60) 2          61) 4          62) 3          63) 2         

64) (8 electrons surrounding O, sharing one with H, plus the negative sign)                   

65) 5          66) 3          67) 1          68) 5          69) 3          70) 4