Question

check all of the following statements that are true about the ion whose symbol is given below. f⁻ the ion has 8 protons. the ion has gained an electron. the ion has 10 electrons. the ion has lost a proton. the ion has gained a neutron.

Explanation:

To solve this, we analyze each statement about the \( \ce{F^-} \) ion:

Step 1: Protons in Fluorine

Fluorine (F) has an atomic number of 9, so a fluorine atom (and its ion \( \ce{F^-} \)) has 9 protons. Thus, "The ion has 8 protons" is false.

Step 2: Electron Gain/Loss

A neutral F atom has 9 electrons. The \( \ce{F^-} \) ion has a -1 charge, meaning it gained 1 electron (now has \( 9 + 1 = 10 \) electrons). So:

• "The ion has gained an electron" is true.
• "The ion has lost a proton" is false (protons don’t change in ions).
• "The ion has 10 electrons" is true (since \( 9 + 1 = 10 \)).

Step 3: Neutron Change

Ion formation (gaining/losing electrons) does not affect neutrons. So "The ion has gained a neutron" is false.

The true statements are:

• The ion has gained an electron.
• The ion has 10 electrons.

(Check the boxes for these two statements.)

Answer:

To solve this, we analyze each statement about the \( \ce{F^-} \) ion:

Step 1: Protons in Fluorine

Fluorine (F) has an atomic number of 9, so a fluorine atom (and its ion \( \ce{F^-} \)) has 9 protons. Thus, "The ion has 8 protons" is false.

Step 2: Electron Gain/Loss

A neutral F atom has 9 electrons. The \( \ce{F^-} \) ion has a -1 charge, meaning it gained 1 electron (now has \( 9 + 1 = 10 \) electrons). So:

• "The ion has gained an electron" is true.
• "The ion has lost a proton" is false (protons don’t change in ions).
• "The ion has 10 electrons" is true (since \( 9 + 1 = 10 \)).

Step 3: Neutron Change

Ion formation (gaining/losing electrons) does not affect neutrons. So "The ion has gained a neutron" is false.

The true statements are:

• The ion has gained an electron.
• The ion has 10 electrons.

(Check the boxes for these two statements.)