Question

name _ date: _ pd _ nuclide symbols hw complete the following chart: name of isotope nuclide symbol mass number atomic number number of protons number of electrons number of neutrons potassium - 41 19 beryllium $_4^8$be 42 20 20 56 28 26 magnesium $_{12}^{22}$mg 30 28 33 76 35 35 phosphorus - 32 15 48 48 60 118 51 51 $_{11}^{23}$na$^+$

Explanation:

Step1: Recall isotope - related concepts

The atomic number ($Z$) is equal to the number of protons. For a neutral atom, the number of electrons is equal to the number of protons. The mass number ($A$) is the sum of the number of protons and neutrons ($A = p + n$), so the number of neutrons $n=A - p$. The nuclide symbol is written as $_{Z}^{A}X$, where $X$ is the chemical symbol of the element.

Step2: Analyze Potassium - 41

The chemical symbol of potassium is $K$. The mass number $A = 41$, and the number of protons $p=19$ (since potassium has an atomic number of 19). For a neutral atom, the number of electrons $e = 19$. The number of neutrons $n=A - p=41 - 19 = 22$. The nuclide symbol is $_{19}^{41}K$.

Step3: Analyze $_{4}^{8}Be$

The element is beryllium. The mass number $A = 8$, the atomic number $Z = 4$ (number of protons), the number of electrons in a neutral atom is 4, and the number of neutrons $n=A - p=8 - 4 = 4$.

Step4: Analyze the row with mass number 42 and atomic number 20

The element is calcium ($Ca$). The number of protons is 20, the number of electrons in a neutral atom is 20, and the number of neutrons $n=A - p=42 - 20 = 22$. The nuclide symbol is $_{20}^{42}Ca$.

Step5: Analyze the row with mass number 56, 28 protons and 26 electrons

The element with 28 protons is nickel ($Ni$). The number of neutrons $n=A - p=56 - 28 = 28$. The nuclide symbol is $_{28}^{56}Ni$. Since there are 26 electrons, it is a $Ni^{2 + }$ ion.

Step6: Analyze $_{12}^{22}Mg$

The number of protons is 12, the number of electrons in a neutral atom is 12, and the number of neutrons $n=A - p=22 - 12 = 10$.

Step7: Analyze the row with 30 protons, 28 electrons and 33 neutrons

The element with 30 protons is zinc ($Zn$). The mass number $A=p + n=30 + 33 = 63$. The nuclide symbol is $_{30}^{63}Zn$. Since there are 28 electrons, it is a $Zn^{2+}$ ion.

Step8: Analyze the row with mass number 76 and atomic number 35

The element is bromine ($Br$). The number of protons is 35, the number of electrons in a neutral atom is 35, and the number of neutrons $n=A - p=76 - 35 = 41$. The nuclide symbol is $_{35}^{76}Br$.

Step9: Analyze Phosphorus - 32

The chemical symbol of phosphorus is $P$. The mass number $A = 32$, the number of protons $p = 15$ (atomic number of phosphorus), the number of electrons in a neutral atom is 15, and the number of neutrons $n=A - p=32 - 15 = 17$. The nuclide symbol is $_{15}^{32}P$.

Step10: Analyze the row with 48 protons, 48 electrons and 60 neutrons

The element with 48 protons is cadmium ($Cd$). The mass number $A=p + n=48+60 = 108$. The nuclide symbol is $_{48}^{108}Cd$.

Step11: Analyze the row with mass number 118 and atomic number 51

The element is antimony ($Sb$). The number of protons is 51, the number of electrons in a neutral atom is 51, and the number of neutrons $n=A - p=118 - 51 = 67$. The nuclide symbol is $_{51}^{118}Sb$.

Step12: Analyze $_{11}^{23}Na^{+}$

The element is sodium. The number of protons is 11, the number of electrons is 10 (because it is a $Na^{+}$ ion), and the number of neutrons $n=A - p=23 - 11 = 12$.

Answer:

Name of Isotope	Nuclide Symbol	Mass Number	Atomic Number	Number of Protons	Number of Electrons	Number of Neutrons
Beryllium	$_{4}^{8}Be$	8	4	4	4	4
Calcium	$_{20}^{42}Ca$	42	20	20	20	22
Nickel - 56 (ion)	$_{28}^{56}Ni^{2+}$	56	28	28	26	28
Magnesium	$_{12}^{22}Mg$	22	12	12	12	10
Zinc - 63 (ion)	$_{30}^{63}Zn^{2+}$	63	30	30	28	33
Bromine	$_{35}^{76}Br$	76	35	35	35	41
Phosphorus - 32	$_{15}^{32}P$	32	15	15	15	17
Cadmium	$_{48}^{108}Cd$	108	48	48	48	60
Antimony	$_{51}^{118}Sb$	118	51	51	51	67
Sodium - 23 (ion)	$_{11}^{23}Na^{+}$	23	11	11	10	12