Question

1. complete the table below. use the example below and the simulation on phet in order to help you find all the information. when writing atom symbols, + or - is the same as writing +1 or -1. if the charge is greater than 1, a number will be included. symbol name # of neutrons # of protons mass # of electrons charge ₆¹²c carbon - 12 6 6 12 6 0 ₉¹⁸f⁻ fluorine 10 9 18 10 - 1 ₅¹¹b boron 6 5 11 5 0 hydrogen - 2 2 0 ₂²²na⁺ 0 carbon - 13 0 ₂⁴he helium ₄₇¹⁰⁷ag⁺ ₃₁⁷⁰ga gallium

Explanation:

Step1: Recall atomic - related formulas

Number of neutrons = Mass number - Atomic number. For a neutral atom, number of electrons = number of protons. For an ion, number of electrons = number of protons - charge (if positive ion) or number of protons+|charge| (if negative ion).

Step2: For Hydrogen - 2 ($^2_1H$)

Atomic number of hydrogen is 1. Mass number is 2. Number of neutrons = 2 - 1=1. Number of protons = 1. Mass number = 2. Number of electrons = 1. Charge = 0. Symbol: $^2_1H$. Name: Hydrogen - 2.

Step3: For $^{22}_{11}Na^+$

Atomic number of sodium (Na) is 11. Mass number is 22. Number of neutrons = 22 - 11 = 11. Number of protons = 11. Mass number = 22. Since it is a + 1 ion, number of electrons = 11 - 1=10. Charge = + 1. Name: Sodium - 22 ion.

Step4: For Carbon - 13 ($^{13}_6C$)

Atomic number of carbon is 6. Mass number is 13. Number of neutrons = 13 - 6 = 7. Number of protons = 6. Mass number = 13. For a neutral atom, number of electrons = 6. Charge = 0. Symbol: $^{13}_6C$. Name: Carbon - 13.

Step5: For $^4_2He$

Atomic number of helium is 2. Mass number is 4. Number of neutrons = 4 - 2 = 2. Number of protons = 2. Mass number = 4. Number of electrons = 2. Charge = 0. Name: Helium.

Step6: For $^{107}_{47}Ag^+$

Atomic number of silver (Ag) is 47. Mass number is 107. Number of neutrons = 107 - 47 = 60. Number of protons = 47. Mass number = 107. Since it is a + 1 ion, number of electrons = 47 - 1 = 46. Charge = + 1. Name: Silver - 107 ion.

Step7: For $^{70}_{31}Ga$

Atomic number of gallium (Ga) is 31. Mass number is 70. Number of neutrons = 70 - 31 = 39. Number of protons = 31. Mass number = 70. Number of electrons = 31. Charge = 0. Name: Gallium.

Symbol	Name	# of neutrons	# of protons	Mass	# of electrons	Charge
$^{22}_{11}Na^+$	Sodium - 22 ion	11	11	22	10	+ 1
$^{13}_6C$	Carbon - 13	7	6	13	6	0
$^4_2He$	Helium	2	2	4	2	0
$^{107}_{47}Ag^+$	Silver - 107 ion	60	47	107	46	+ 1
$^{70}_{31}Ga$	Gallium	39	31	70	31	0

Answer:

Step1: Recall atomic - related formulas

Number of neutrons = Mass number - Atomic number. For a neutral atom, number of electrons = number of protons. For an ion, number of electrons = number of protons - charge (if positive ion) or number of protons+|charge| (if negative ion).

Step2: For Hydrogen - 2 ($^2_1H$)

Atomic number of hydrogen is 1. Mass number is 2. Number of neutrons = 2 - 1=1. Number of protons = 1. Mass number = 2. Number of electrons = 1. Charge = 0. Symbol: $^2_1H$. Name: Hydrogen - 2.

Step3: For $^{22}_{11}Na^+$

Atomic number of sodium (Na) is 11. Mass number is 22. Number of neutrons = 22 - 11 = 11. Number of protons = 11. Mass number = 22. Since it is a + 1 ion, number of electrons = 11 - 1=10. Charge = + 1. Name: Sodium - 22 ion.

Step4: For Carbon - 13 ($^{13}_6C$)

Atomic number of carbon is 6. Mass number is 13. Number of neutrons = 13 - 6 = 7. Number of protons = 6. Mass number = 13. For a neutral atom, number of electrons = 6. Charge = 0. Symbol: $^{13}_6C$. Name: Carbon - 13.

Step5: For $^4_2He$

Atomic number of helium is 2. Mass number is 4. Number of neutrons = 4 - 2 = 2. Number of protons = 2. Mass number = 4. Number of electrons = 2. Charge = 0. Name: Helium.

Step6: For $^{107}_{47}Ag^+$

Atomic number of silver (Ag) is 47. Mass number is 107. Number of neutrons = 107 - 47 = 60. Number of protons = 47. Mass number = 107. Since it is a + 1 ion, number of electrons = 47 - 1 = 46. Charge = + 1. Name: Silver - 107 ion.

Step7: For $^{70}_{31}Ga$

Atomic number of gallium (Ga) is 31. Mass number is 70. Number of neutrons = 70 - 31 = 39. Number of protons = 31. Mass number = 70. Number of electrons = 31. Charge = 0. Name: Gallium.

Symbol	Name	# of neutrons	# of protons	Mass	# of electrons	Charge
$^{22}_{11}Na^+$	Sodium - 22 ion	11	11	22	10	+ 1
$^{13}_6C$	Carbon - 13	7	6	13	6	0
$^4_2He$	Helium	2	2	4	2	0
$^{107}_{47}Ag^+$	Silver - 107 ion	60	47	107	46	+ 1
$^{70}_{31}Ga$	Gallium	39	31	70	31	0