Podcast
Questions and Answers
What is the equation, with state symbols, which represents the first ionization energy of arsenic?
What is the equation, with state symbols, which represents the first ionization energy of arsenic?
- $As(g) ightarrow As^+(g) + e^-$ (correct)
- $As(g) + energy ightarrow As^+(g) + e^-$
- $As^+(g) ightarrow As(g) + e^-$
- $As(g) + e^- ightarrow As^-(g)$
What is the electronic configuration for an arsenic atom using the electrons-in-boxes notation?
What is the electronic configuration for an arsenic atom using the electrons-in-boxes notation?
- 1s22s22p63s23p64s23d104s24p3
- 1s22s22p63s23p63d104s23p4 (correct)
- 1s22s22p63s23p63d104s24p3
- 1s22s22p63s23p64s23d104p3
Why is the first ionization energy of selenium lower than that of arsenic?
Why is the first ionization energy of selenium lower than that of arsenic?
- Selenium has more electron shielding than arsenic (correct)
- Selenium has a smaller atomic radius than arsenic
- Selenium has a larger atomic radius than arsenic
- Selenium has fewer electron shells than arsenic
Explain why the first ionization energy of krypton is higher than that of selenium.
Explain why the first ionization energy of krypton is higher than that of selenium.
Which of the elements, arsenic to rubidium, is likely to have atoms with the smallest atomic radius?
Which of the elements, arsenic to rubidium, is likely to have atoms with the smallest atomic radius?
Why is it necessary to study the chemical and physical properties of each element?
Why is it necessary to study the chemical and physical properties of each element?
What was the main reason for scientists to classify the elements?
What was the main reason for scientists to classify the elements?
How many elements were known by 1865?
How many elements were known by 1865?
What is the significance of the increasing number of identified elements over time?
What is the significance of the increasing number of identified elements over time?
What is the relevance of studying the chemistry of all the elements and their compounds?
What is the relevance of studying the chemistry of all the elements and their compounds?
