ATOMIC STRUCTURE & THE PERIODIC TABLE

Answer these questions.
1.  All atoms of the same element have the same number of what subatomic particle? protons

2.  What is an isotope? Atoms of same element with different masses (difft. # of neutrons)

3.  Where are the metals located on the Periodic Table? Left of the staircase line

4.  Where are the nonmetals?  Metalloids?  Transition Metals? Nonmetals = right of staircase line; metalloids = along staircase line; transition metals = groups 3 - 12

Use your Periodic Table to fill in this chart.

 

Element

Symbol

# of protons

# of neutrons

atomic number

# of electrons

mass #

1.

 nitrogen 14

14N

7

7

7

7

14

2.

 aluminum 27

27Al

13 

14

13

13

27

3.

CALCIUM 40

40Ca

20 

20

20

20

40

4.

 barium 137

137Ba

56

81 

56

56

137

5.

 zinc 65

65Zn

30 

35

30

30

65

6.

 iodine - 127

127I

53 

74

53

53

127

7.

STRONTIUM 88

88Sr

38

50

38

38

88

8.

FLUORINE - 19

19

10

9

9

19

9.

 argon 40

40Ar

18

22

18

18

40

10.

 uranium 238

238U

92

146

92

92

238

11.

 bismuth 209

209Bi

83 

126

83 

83

209

12.

 phosphorus 31

31P

15

 16

15

15

31

13.

 selenium 76

76Se

34

42

34

34

76

14.

 silver - 108

108Ag

47 

61

 47

 47

 108

 

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