Question

periodic table packet #1
name____ period____
6.4 c periodic table of elements
directions: use the periodic table to fill in the below chart.
element symbol atomic number # of protons # of electrons atomic mass rounded atomic mass (show work) # of neutrons period
1 oxygen o 8 8 8 15 999 16 16 - 8 = 8 2
2 helium
3 carbon
4 aluminum
5 calcium
6 sodium
7 potassium
8 nitrogen
9 silicon
10 iron
11 hydrogen

Explanation:

Step1: Find element information from periodic table

For Helium: Symbol is He, Atomic Number is 2, number of protons = Atomic Number = 2, in a neutral atom number of electrons = number of protons = 2, Atomic Mass is approximately 4.003, Rounded Atomic Mass is 4, number of neutrons = Rounded Atomic Mass - Atomic Number = 4 - 2 = 2, Period is 1.

Step2: Repeat for Carbon

Symbol is C, Atomic Number is 6, number of protons = 6, number of electrons = 6, Atomic Mass is approximately 12.011, Rounded Atomic Mass is 12, number of neutrons = 12 - 6 = 6, Period is 2.

Step3: Repeat for Aluminum

Symbol is Al, Atomic Number is 13, number of protons = 13, number of electrons = 13, Atomic Mass is approximately 26.982, Rounded Atomic Mass is 27, number of neutrons = 27 - 13 = 14, Period is 3.

Step4: Repeat for Calcium

Symbol is Ca, Atomic Number is 20, number of protons = 20, number of electrons = 20, Atomic Mass is approximately 40.078, Rounded Atomic Mass is 40, number of neutrons = 40 - 20 = 20, Period is 4.

Step5: Repeat for Sodium

Symbol is Na, Atomic Number is 11, number of protons = 11, number of electrons = 11, Atomic Mass is approximately 22.990, Rounded Atomic Mass is 23, number of neutrons = 23 - 11 = 12, Period is 3.

Step6: Repeat for Potassium

Symbol is K, Atomic Number is 19, number of protons = 19, number of electrons = 19, Atomic Mass is approximately 39.098, Rounded Atomic Mass is 39, number of neutrons = 39 - 19 = 20, Period is 4.

Step7: Repeat for Nitrogen

Symbol is N, Atomic Number is 7, number of protons = 7, number of electrons = 7, Atomic Mass is approximately 14.007, Rounded Atomic Mass is 14, number of neutrons = 14 - 7 = 7, Period is 2.

Step8: Repeat for Silicon

Symbol is Si, Atomic Number is 14, number of protons = 14, number of electrons = 14, Atomic Mass is approximately 28.086, Rounded Atomic Mass is 28, number of neutrons = 28 - 14 = 14, Period is 3.

Step9: Repeat for Iron

Symbol is Fe, Atomic Number is 26, number of protons = 26, number of electrons = 26, Atomic Mass is approximately 55.845, Rounded Atomic Mass is 56, number of neutrons = 56 - 26 = 30, Period is 4.

Step10: Repeat for Hydrogen

Symbol is H, Atomic Number is 1, number of protons = 1, number of electrons = 1, Atomic Mass is approximately 1.008, Rounded Atomic Mass is 1, number of neutrons = 1 - 1 = 0, Period is 1.

Element	Symbol	Atomic Number	# of protons	# of electrons	Atomic Mass	Rounded Atomic Mass	(show work) # of Neutrons	Period
Helium	He	2	2	2	4.003	4	4 - 2 = 2	1
Carbon	C	6	6	6	12.011	12	12 - 6 = 6	2
Aluminum	Al	13	13	13	26.982	27	27 - 13 = 14	3
Calcium	Ca	20	20	20	40.078	40	40 - 20 = 20	4
Sodium	Na	11	11	11	22.990	23	23 - 11 = 12	3
Potassium	K	19	19	19	39.098	39	39 - 19 = 20	4
Nitrogen	N	7	7	7	14.007	14	14 - 7 = 7	2
Silicon	Si	14	14	14	28.086	28	28 - 14 = 14	3
Iron	Fe	26	26	26	55.845	56	56 - 26 = 30	4
Hydrogen	H	1	1	1	1.008	1	1 - 1 = 0	1

Answer:

See the above - filled table.