Question

1. how are uranium - 238 and uranium - 235 similar? different?
2. fill in the following table. be careful, it contains ions and isotopes.

isotopic notation	atomic #	mass #	# of protons	# of electrons	# of neutrons	net charge
$_{47}^{108}ag^{1 + }$				46
			30		35	0

Explanation:

Step1: Recall isotope properties

Uranium - 238 and Uranium - 235 are isotopes of uranium. Isotopes of an element have the same number of protons.

Step2: Identify differences

They have different mass numbers due to different numbers of neutrons. Uranium - 238 has more neutrons than Uranium - 235.

For question 11:

First row:

Step1: Determine atomic number

Atomic number = 13, so the element is aluminum (Al).

Step2: Calculate mass number

Mass number = number of protons+number of neutrons = 13 + 15=28.

Step3: Determine net charge

Since number of protons = number of electrons = 13, net charge = 0. Isotopic notation is $^{28}_{13}Al$.

Second row:

Step1: Identify atomic number

For $^{108}_{47}Ag^{1 +}$, atomic number = 47.

Step2: Determine mass number

Mass number = 108.

Step3: Calculate number of neutrons

Number of neutrons=mass number - number of protons = 108 - 47 = 61.

Step4: Determine net charge

Net charge = + 1.

Third row:

Step1: Determine atomic number

Since number of protons = 30, atomic number = 30, and the element is zinc (Zn).

Step2: Calculate mass number

Mass number = number of protons+number of neutrons = 30+35 = 65.

Step3: Determine number of electrons

Since net charge = 0, number of electrons = number of protons = 30. Isotopic notation is $^{65}_{30}Zn$.

Isotopic Notation	Atomic #	Mass #	# of Protons	# of Electrons	# of Neutrons	Net Charge
$^{108}_{47}Ag^{1+}$	47	108	47	46	61	+1
$^{65}_{30}Zn$	30	65	30	30	35	0

Answer:

For question 10: Similarities: They are isotopes of uranium, so they have the same number of protons. Differences: They have different mass numbers and different numbers of neutrons.
For question 11: See the completed table above.