Understanding Bromine Ions and Electrons

This video tutorial explains how to determine the number of protons and electrons in the bromide ion (Br-). It starts by identifying the atomic number of bromine, which is 35, indicating 35 protons in a neutral bromine atom. The video then explains that in a bromide ion, there is one extra electron, making the total electron count 36. The tutorial emphasizes the concept of ions, where gaining an electron results in a negative charge, forming a negative ion.

What is the main focus of this video tutorial?

• Determining the number of protons and electrons in bromide ion

• Understanding the chemical reactions of bromine

• Calculating the atomic mass of bromine

• Finding the number of neutrons in bromide ion

What does the atomic number of an element represent?

• The number of neutrons

• The number of protons

• The number of electrons in an ion

• The atomic mass

How many protons are present in a neutral bromine atom?

• 34

• 35

• 36

• 37

What is the difference in electron count between neutral bromine and the bromide ion?

• Bromide ion has one more electron

• Bromide ion has two more electrons

• They have the same number of electrons

• Bromide ion has one less electron

How many electrons does the bromide ion have?

• 34

• 35

• 36

• 37

What happens to an atom when it gains an extra electron?

• It loses its atomic number

• It becomes negatively charged

• It becomes a neutral atom

• It becomes positively charged

What is the charge of the bromide ion?

• Double negative

• Negative

• Positive

• Neutral

Why does the bromide ion have a negative charge?

• It has more electrons than protons

• It has more protons than electrons

• It has lost an electron

• It has equal protons and electrons

What is the significance of understanding protons and electrons in ions?

• To calculate atomic mass

• To determine physical properties

• To predict chemical reactions

• To understand ion charges