Valence Electrons and Arsenic Properties

The video tutorial explains two main methods to determine the number of valence electrons for arsenic. The first method involves using the periodic table, where arsenic is found in group 15, indicating it has five valence electrons. The second method uses the electron configuration, focusing on the highest energy level to confirm the presence of five valence electrons. Additionally, the video describes how to write the Lewis structure for arsenic by placing five valence electrons around the element symbol 'As'.

What is one method to determine the number of valence electrons in arsenic?

• By observing its color

• By looking at its position in the periodic table

• By checking its atomic mass

• By measuring its density

Which group in the periodic table contains elements with two valence electrons?

• Group 1

• Group 18

• Group 2

• Group 13

Arsenic is located in which group of the periodic table?

• Group 18

• Group 17

• Group 15

• Group 13

How many valence electrons does arsenic have according to its electron configuration?

• Three

• Four

• Six

• Five

What is the highest energy level considered when determining arsenic's valence electrons?

• Third energy level

• Fifth energy level

• Second energy level

• Fourth energy level

What is the Lewis structure representation for arsenic?

• As with three dots around it

• As with four dots around it

• As with five dots around it

• As with six dots around it

Which method is NOT used to determine the number of valence electrons in arsenic?

• Periodic table position

• Electron configuration

• Atomic mass

• Lewis structure