Question

1. what subatomic particles are in an uncharged isotope with atomic number 10 and 27 nucleons? # p⁺: # of protons? # n⁰: # of neutrons? # e⁻: # of electrons? 8. what is the isotope name for a nucleus with 77 protons and 171 nucleons? isotope name? 9. what is the atomic number for po? atomic number? 10. what is the symbol for the element with atomic #42? element symbol? 11. what is the name of the element with atomic #86? element name? 12. what subatomic particles are in zn²⁺ if its mass number is 57? # p⁺: # of protons? # n⁰: # of neutrons? # e⁻: # of electrons?

Explanation:

Step1: Recall atomic number property

Atomic number = number of protons. For question 7, atomic number is 10, so number of protons $p^{+}=10$.

Step2: Calculate number of neutrons

Number of nucleons = number of protons + number of neutrons. For question 7, neutrons $n^{0}=27 - 10=17$.

Step3: Determine number of electrons in neutral atom

In an un - charged isotope, number of electrons = number of protons. So for question 7, $e^{-}=10$.

Step4: Identify element by number of protons

For question 8, 77 protons means the element is Iridium (Ir). Isotope name is element - mass number, so Iridium - 171.

Step5: Look up atomic number

For question 9, looking up in periodic table, Po (Polonium) has atomic number 84.

Step6: Find element symbol

For question 10, element with atomic number 42 is Molybdenum, symbol Mo.

Step7: Find element name

For question 11, element with atomic number 86 is Radon.

Step8: Recall atomic number of Zn

Zinc (Zn) has atomic number 30, so number of protons $p^{+}=30$ for question 12.

Step9: Calculate number of neutrons for Zn

Number of neutrons $n^{0}=57 - 30 = 27$ for question 12.

Step10: Determine number of electrons for ion

$Zn^{2 + }$ means 2 electrons are lost. Zinc has 30 electrons as a neutral atom, so $e^{-}=30 - 2=28$ for question 12.

Answer:

7.

$p^{+}$: 10

$n^{0}$: 17

$e^{-}$: 10

1. Iridium - 171
2. 84
3. Mo
4. Radon

12.

$p^{+}$: 30

$n^{0}$: 27

$e^{-}$: 28