Understanding Ions and Atomic Structure

The video tutorial explains how to determine the number of protons and electrons in the iodide ion (I-). It begins by identifying iodine on the periodic table, noting that its atomic number is 53, which equals the number of protons. For neutral iodine, the number of electrons also equals 53. However, for the iodide ion, an extra electron is added due to the negative charge, resulting in 54 electrons. The video concludes by explaining how electron transfer affects ion charge.

What is the first step in determining the number of protons and electrons in the iodide ion?

• Count the number of neutrons.

• Measure the ion's charge.

• Look at the periodic table.

• Check the atomic mass of iodine.

What does the atomic number of an element represent?

• The number of neutrons.

• The number of electrons in a charged ion.

• The number of protons in a neutral atom.

• The total mass of the atom.

In a neutral iodine atom, how do the number of protons and electrons compare?

• Protons are double the electrons.

• Electrons are double the protons.

• Protons are half the electrons.

• They are equal.

How many electrons does a neutral iodine atom have?

• 53

• 55

• 52

• 54

What is the total number of electrons in the iodide ion (I-)?

• 52

• 54

• 53

• 55

How does the iodide ion differ from a neutral iodine atom in terms of electrons?

• It has two more electrons.

• It has the same number of electrons.

• It has one less electron.

• It has one more electron.

What happens to an atom when it loses an electron?

• It becomes a negative ion.

• It becomes a positive ion.

• It remains neutral.

• It gains a proton.

What charge does an atom have when it gains an electron?

• Double positive

• Negative

• Neutral

• Positive

Why is it important to understand the concept of ions gaining or losing electrons?

• To predict chemical reactions.

• To calculate atomic mass.

• To determine the element's color.

• To measure the element's density.

What is the role of the periodic table in understanding ions?

• It lists the element's color.

• It provides the atomic number.

• It shows the atomic mass.

• It indicates the element's density.