Question

use the references to access important values if needed for this question. try to complete the missing information for these three isotopes using only the data provided. isotope #1 • element symbol blank • nuclear symbol: $_{7}^{14}n$ • atomic number blank • mass number blank • protons blank • neutrons blank • electrons blank isotope #2 • element symbol: mn • nuclear symbol blank • atomic number blank • mass number: 55 • protons blank • neutrons blank • electrons: 25

Explanation:

Step1: Recall atomic number from nuclear symbol for Isotope #1

The sub - script in the nuclear symbol $^{14}_{7}N$ is the atomic number. So the atomic number of Isotope #1 is 7.

Step2: Recall element symbol from nuclear symbol for Isotope #1

The letter in the nuclear symbol $^{14}_{7}N$ is the element symbol. So the element symbol is N.

Step3: Recall mass number from nuclear symbol for Isotope #1

The super - script in the nuclear symbol $^{14}_{7}N$ is the mass number. So the mass number is 14.

Step4: Determine number of protons for Isotope #1

The number of protons is equal to the atomic number. So for Isotope #1, the number of protons is 7.

Step5: Calculate number of neutrons for Isotope #1

Number of neutrons = Mass number - Number of protons. So, $14 - 7=7$.

Step6: Determine number of electrons for Isotope #1

For a neutral atom, number of electrons = number of protons. So for Isotope #1, number of electrons is 7.

Step7: Determine atomic number for Isotope #2

Look up the atomic number of Mn (manganese) in the periodic table. The atomic number of Mn is 25.

Step8: Determine number of protons for Isotope #2

The number of protons is equal to the atomic number. So for Isotope #2, the number of protons is 25.

Step9: Calculate number of neutrons for Isotope #2

Number of neutrons = Mass number - Number of protons. Given mass number = 55 and number of protons = 25, so $55 - 25 = 30$.

Step10: Write nuclear symbol for Isotope #2

The nuclear symbol is $^{55}_{25}Mn$.

Answer:

Isotope #1:

• Element Symbol: N
• Atomic Number: 7
• Mass Number: 14
• Protons: 7
• Neutrons: 7
• Electrons: 7

Isotope #2:

• Nuclear Symbol: $^{55}_{25}Mn$
• Atomic Number: 25
• Protons: 25
• Neutrons: 30