Question

fill in the information for the anion $^{130}_{x}te^{- 2}
x$ is the atomic number from the periodic table, 1
2 number of protons
3 number of neutrons
4 number of electrons
5 number of nucleons
a. 52 b. 54 c. 32 d. 78 e. 130 f. 76 g. 128

Explanation:

Step1: Identify atomic number of Te

From periodic table, atomic number of tellurium (Te) is 52.

Step2: Determine number of protons

Atomic number = number of protons. So number of protons is 52.

Step3: Calculate number of neutrons

Mass - number = 130, atomic - number = 52. Number of neutrons = mass - number - atomic - number = 130 - 52=78.

Step4: Calculate number of electrons

It is a 2 - minus anion. Neutral Te has 52 electrons. So number of electrons = 52 + 2=54.

Step5: Define number of nucleons

Nucleons are protons + neutrons. Mass - number represents number of nucleons. So number of nucleons is 130.

Answer:

1. A. 52
2. A. 52
3. D. 78
4. B. 54
5. E. 130