Question

**1. label the parts of an atom in the diagram below
a) what type of charge does a proton have?
b) what type of charge does a neutron have?
c) what type of charge does an electron have?
d) which two subatomic particles are located in the nucleus of an atom?
**2. an element is represented by its chemical symbol along with a few numbers. based on the example on the right, fill in the numbers of protons (p), neutrons (n), and electrons (e) for the following elements.

1. complete the table using your knowledge of the periodic table.

Explanation:

Step1: Recall sub - atomic particle charges

A proton has a positive charge, a neutron has no charge, and an electron has a negative charge.

Step2: Identify nucleus - located particles

Protons and neutrons are located in the nucleus of an atom.

Step3: Use atomic number and mass number relationships

The atomic number is equal to the number of protons and electrons in a neutral atom. The number of neutrons is approximately the mass number minus the atomic number.

For Carbon (C):

Atomic number = 6, so #P = 6, #E = 6. Mass number is approximately 12 (from average atomic mass rounded), so #N=12 - 6=6.

For Neon (Ne):

Atomic number = 10, so #P = 10, #E = 10. Mass number is approximately 20 (from average atomic mass rounded), so #N = 20 - 10=10.

For Potassium (K):

Atomic number = 19, so #P = 19, #E = 19. Mass number is approximately 39 (from average atomic mass rounded), so #N=39 - 19 = 20.

For Sodium (Na):

Atomic number = 11, Mass number = 11+12 = 23. So Atomic number = 11, Mass number = 23, #P = 11, #E = 11.

For Potassium (K) in table:

Atomic number = 19, Mass number = 39, #P = 19, #E = 19, #N=39 - 19 = 20.

For an element with #P = 38:

Atomic number = 38 (Strontium, Sr), Mass number = 38 + 50=88, #E = 38.

For Fluorine (F):

Atomic number = 9, Mass number = 9 + 10 = 19, #P = 9, #E = 9.

For an element with Atomic number = 20 (Calcium, Ca):

Mass number = 40, #P = 20, #E = 20, #N=40 - 20 = 20.

For an element with #E = 50:

Since #P=#E in neutral atom, #P = 50 (Tin, Sn), Mass number = 50+69 = 119.

For Iodine (I):

Atomic number = 53, Mass number = 127, #P = 53, #E = 53, #N=127 - 53 = 74.

Answer:

1.
a) Positive charge
b) No charge
c) Negative charge
d) Protons and neutrons
2.
Carbon: #P = 6, #N = 6, #E = 6
Neon: #P = 10, #N = 10, #E = 10
Potassium: #P = 19, #N = 20, #E = 19
3.

Symbol	Atomic Number	Mass Number	Number of Protons	Number of Electrons	Number of Neutrons
K	19	39	19	19	20
Sr	38	88	38	38	50
F	9	19	9	9	10
Ca	20	40	20	20	20
Sn	50	119	50	50	69
I	53	127	53	53	74