Question

practice: isotope calculations #1
part 1: use the notation below to answer the following questions.
12c 13c 14c

1. different versions of the same element, like pictured above, are known as
2. the numbers 12, 13, and 14 refer to the
3. what subatomic particle makes each of these isotopes different?
4. how many does each have of #3?
5. what subatomic particle makes each of these isotopes the same?
6. how many does each have of #5?
7. this form of notation is known as
8. the other form of isotope notation is known as
9. for each isotope, write it in the form listed in #8.

part 2: complete the chart below.
10.

isotope (hyphen form)	isotope (nuclear form)	atomic #	mass #	# of p+	# of n0	# of e-
uranium - 235
		5		5
	37k
		11	5
			47	60
	238u
oxygen - 17
		108		61

Explanation:

Step1: Recall isotope definition

Isotopes are different versions of same element.

Step2: Identify mass - number concept

The numbers 12, 13, 14 are mass - numbers.

Step3: Determine differentiating particle

Neutrons make isotopes different.

Step4: Calculate neutrons

$^{12}C$ has 6 neutrons, $^{13}C$ has 7, $^{14}C$ has 8.

Step5: Identify same - making particle

Protons make isotopes the same.

Step6: Count protons

Each carbon isotope has 6 protons.

Step7: Name notation

This is nuclear notation.

Step8: Name other notation

Hyphen notation.

Step9: Write in hyphen form

Carbon - 12, Carbon - 13, Carbon - 14.

For part 2:
Uranium - 235: $^{235}_{92}U$, 92, 235, 92, 143, 92
For atomic number 5: Boron - 5, $^{5}_{5}B$, 5, 5, 5, 0, 5
For $^{37}K$: Potassium - 37, $^{37}_{19}K$, 19, 37, 19, 18, 19
For atomic number 11 and 5 neutrons: Sodium - 16, $^{16}_{11}Na$, 11, 16, 11, 5, 11
For 47 protons and 60 neutrons: Silver - 107, $^{107}_{47}Ag$, 47, 107, 47, 60, 47
For $^{238}U$: Uranium - 238, $^{238}_{92}U$, 92, 238, 92, 146, 92
For Oxygen - 17: $^{17}_{8}O$, 8, 17, 8, 9, 8
For atomic number 108 and 61 neutrons: Hassium - 169, $^{169}_{108}Hs$, 108, 169, 108, 61, 108

Answer:

1. Isotopes
2. Mass - numbers
3. Neutrons
4. $^{12}C$: 6, $^{13}C$: 7, $^{14}C$: 8
5. Protons
6. 6
7. Nuclear notation
8. Hyphen notation
9. Carbon - 12, Carbon - 13, Carbon - 14
10. See above isotope - chart values.