Exams & Certification

QUESTION 4 Identify the electron configuration for the alkaline earth metal in period four. 1s²2s²2p?3s²3p?4s¹ 1s²2s²2p?3s²3p?4s²4p¹ 1s²2s²2p?3s²3p?4s² 1s²2s²2p?3s²3d¹?3p?4s² 1s²2s²3s²4s² QUESTION 5 What is the most likely charged state for a nitrogen ion with a filled valence shell of electrons? N³? N?? N?? N³? N?? QUESTION 6 Which of the following compounds is held together by […]

If CN^ – is a Lewis base, can it also act as a Lewis acid? The Correct Answer and Explanation is: Expand to view model thoughtschevron_righteditmore_vert Correct Answer No, the cyanide ion (CN⁻) cannot act as a general Lewis acid in typical chemical reactions. Its fundamental and overwhelmingly dominant chemical character is that of a

Bromosuccinimide (NBS), one product dominates. Draw this product and explain why it is the major product. (E)-2,5-dimethyl-3-hexeneIn the free radical bromination of (E)-2,5-dimethyl-3-hexene using N-bromosuccinimide (NBS), one product dominates. Draw this product and explain why it is the major product. (E)-2,5-dimethyl-3-hexene The Correct Answer and Explanation is: Major Product of the Reaction The reaction of

Ground state electron configuration that doesn’t quite follow the filling rules. The configuration is: [Rn]5f6d7s. Neptunium does obey Hund’s rule. Use the table below to assign a set of four quantum numbers to each electron beyond the radon configuration: Electron # n l mm1 2 3 4 5 6 7 The Correct Answer and Explanation

Elements: In the space below, write the unabbreviated electron configurations of the following elements: – Sodium: 1s^2 2s^2 2p^6 3s^1 – Iron: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6 – Bromine: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5 – Barium: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 – Neptunium:

Describe the difference between intensive and extensive properties. Which of the following properties are intensive: (a) mass: (b) density; (c) volume; (d) melting point? The Correct Answer and Explanation is: The correct answer is that (b) density and (d) melting point are intensive properties. In the study of matter, physical properties are categorized into two main types: intensive and

Which ICS functional area sets the incident objectives, strategies, and priorities, and has overall responsibility for the incident? A. Command B. Finance/Administration C. Operations D. Logistics The Correct Answer and Explanation is: The correct answer is A. Command. Explanation In the Incident Command System (ICS), the Command functional area is singularly responsible for the overall management of an

What is the projection of the point on the xy-plane? (x,y,z)=(,) What is the projection of the point on the yz-plane? (x,y,z)=(,) What is the projection of the point on the xz-plane? (x,y,z)=(,) Draw a rectangular box with the origin and (3,5,6) as opposite vertices and with its faces parallel to 3,5,6 What is the

(3,5,6) What is the projection of the point on the xy-plane? (x,y,z)=(,) What is the projection of the point on the yz-plane? (x,y,z)=(,) What is the projection of the point on the xz-plane? (x,y,z)=(,) Draw a rectangular box with the origin and (3,5,6) as opposite vertices and with its faces parallel to 3,5,6 What is

Consider the point. (3; 5, 6) What is the projection of the point on the xy-plane? (x,y,z)=( boxed 3,5,0 ) What is the projection of the point on the yz-plane? (x,y,z)=( boxed 0,5,6 ) What is the projection of the point on the -plane ? (x,y,z)=( boxed 3,0,6 ) Draw a rectangular box with the