Sulfide Ion and Sulfur Properties

This video tutorial explains how to determine the number of protons and electrons in the sulfide ion (S2-). It begins by introducing sulfur as it appears on the periodic table, highlighting that the atomic number equals the number of protons. The video then compares neutral sulfur to the S2- ion, noting that the difference lies in the number of electrons. It explains that neutral sulfur has 16 protons and electrons, while the S2- ion has 18 electrons due to the addition of two extra electrons. The tutorial concludes with a discussion on ion charge and electron transfer, emphasizing that gaining electrons results in a negative ion.

What is the main focus of this video?

• Finding the number of protons and electrons in S2-

• Discussing chemical reactions

• Finding the number of neutrons in S2-

• Explaining the periodic table

What is the atomic number of sulfur as shown on the periodic table?

• 32

• 16

• 8

• 18

How many protons does neutral sulfur have?

• 18

• 32

• 16

• 8

What is the key difference between neutral sulfur and the sulfide ion?

• Number of protons

• Number of neutrons

• Atomic mass

• Number of electrons

What is the charge of a neutral sulfur atom?

• Variable

• Negative

• Zero

• Positive

How many electrons does the sulfide ion (S2-) have?

• 18

• 14

• 20

• 16

Why does the sulfide ion have a negative charge?

• It has lost electrons

• It has equal protons and electrons

• It has more electrons than protons

• It has more protons than electrons

What happens to an atom when it loses an electron?

• It becomes a negative ion

• It becomes a positive ion

• It remains neutral

• It becomes unstable

What is the role of Dr. B in the video?

• To teach about atomic mass

• To find the number of protons and electrons in S2-

• To discuss chemical bonding

• To explain the periodic table