Question

directions: fill in the table with the missing parts. assume all of the elements are neutral and there are no isotopes. when calculating the neutrons round to the nearest whole number.

element name	symbol	atomic number	atomic mass	protons	electrons	neutrons
gold		79			79
	na
oxygen				8
		19
nickle	ni					31
			32.065			16
				1		0
fluorine
				10	10
	cl		35.453
magnesium
manganese
			14.0067			7
	ti
		92

Explanation:

Step1: Recall element - property relationships

For a neutral atom, the number of protons = atomic number = number of electrons. The number of neutrons is approximately the atomic mass - atomic number (rounded to the nearest whole number).

Step2: Fill in Gold row

The symbol for gold is Au. The atomic number is 79, so the number of protons is 79. Since it's neutral, the number of electrons is 79. The atomic mass of gold is approximately 197. So the number of neutrons is \(197 - 79=118\).

Step3: Fill in Sodium (Na) row

The element name is Sodium. The atomic number of sodium is 11. So the number of protons is 11, the number of electrons is 11 (since it's neutral). The atomic mass of sodium is approximately 23. So the number of neutrons is \(23 - 11 = 12\).

Step4: Fill in Oxygen row

The symbol for oxygen is O. The atomic number is 8, so the number of protons is 8. Since it's neutral, the number of electrons is 8. The atomic mass of oxygen is approximately 16. So the number of neutrons is \(16 - 8=8\).

Step5: Fill in the element with atomic number 19 row

The element is Potassium (K). The number of protons is 19, the number of electrons is 19 (since it's neutral). The atomic mass of potassium is approximately 39. So the number of neutrons is \(39 - 19 = 20\).

Step6: Fill in Nickel row

The atomic number of nickel is 28. So the number of protons is 28, the number of electrons is 28 (since it's neutral). Given the number of neutrons is 31, the atomic mass is approximately \(28 + 31=59\).

Step7: Fill in the element with atomic mass 32.065 row

The element is Sulfur (S). The atomic number of sulfur is 16. So the number of protons is 16, the number of electrons is 16 (since it's neutral). Given the number of neutrons is 16, the atomic mass is approximately \(16+16 = 32\) (close to 32.065).

Step8: Fill in the element with 1 proton row

The element is Hydrogen (H). The symbol is H, the atomic number is 1, the number of electrons is 1 (since it's neutral), and the atomic mass is approximately 1.

Step9: Fill in Fluorine row

The symbol for fluorine is F. The atomic number of fluorine is 9. So the number of protons is 9, the number of electrons is 9 (since it's neutral). Given the number of neutrons is 10, the atomic mass is approximately \(9 + 10=19\).

Step10: Fill in Chlorine (Cl) row

The atomic number of chlorine is 17. So the number of protons is 17, the number of electrons is 17 (since it's neutral). Given the atomic mass is 35.453, the number of neutrons is approximately \(35 - 17=18\) (rounded to the nearest whole - number).

Step11: Fill in Magnesium row

The symbol for magnesium is Mg. The atomic number of magnesium is 12. So the number of protons is 12, the number of electrons is 12 (since it's neutral). The atomic mass of magnesium is approximately 24. So the number of neutrons is \(24 - 12 = 12\).

Step12: Fill in Manganese row

The symbol for manganese is Mn. The atomic number of manganese is 25. So the number of protons is 25, the number of electrons is 25 (since it's neutral). Given the number of neutrons is 30 (assuming we calculate from a common atomic mass of 55, \(55 - 25=30\)).

Step13: Fill in the element with atomic mass 14.0067 row

The element is Nitrogen (N). The symbol is N. The atomic number is 7, so the number of protons is 7, the number of electrons is 7 (since it's neutral). Given the number of neutrons is 7.

Step14: Fill in Titanium (Ti) row

The atomic number of titanium is 22. So the number of protons is 22, the number of electrons is 22 (since it's neutral). The atomic mass of titanium is approximately 48. So the number of neutrons is \(48 - 22 = 26\).

Step15: Fill in the element with atomic number 92 row

The element is Uranium (U). The symbol is U. The number of protons is 92, the number of electrons is 92 (since it's neutral). The atomic mass of uranium is approximately 238. So the number of neutrons is \(238 - 92=146\).

Answer:

Element Name	Symbol	Atomic Number	Atomic Mass	Protons	Electrons	Neutrons
Gold	Au	79	197	79	79	118
Sodium	Na	11	23	11	11	12
Oxygen	O	8	16	8	8	8
Potassium	K	19	39	19	19	20
Nickel	Ni	28	59	28	28	31
Sulfur	S	16	32.065	16	16	16
Hydrogen	H	1	1	1	1	0
Fluorine	F	9	19	9	9	10
Chlorine	Cl	17	35.453	17	17	18
Magnesium	Mg	12	24	12	12	12
Manganese	Mn	25	55	25	25	30
Nitrogen	N	7	14.0067	7	7	7
Titanium	Ti	22	48	22	22	26
Uranium	U	92	238	92	92	146