Ions (Simplified) Practice Problems

What is the symbol for the ion of selenium (Se)?

How are atoms, isotopes, and ions of the same element similar?

Which of the following statements is true?

The number of each subatomic particle in ²⁴Mg²⁺ are:

a. Determine the number of protons, neutrons, and electrons in a neutral iodine-127 atom.

b. The ion S^2– has ___ protons and ___ electrons.

c. What isotope has 17 protons and 18 neutrons? Write the name of the element followed by a hyphen and the mass number (e.g. carbon–13).

d. Identify the element that is represented in the following expression: 75/33 X? Write the chemical symbol of the element.

Identify the species that is isoelectronic with Se^2–.