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	^19F	9	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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