C. Remove the most loosely held electron from a gaseous atom
D. Form an ionic crystal
Answer: Option C
Solution (By JKExamLibrary)
Ionization energy (IE) is the minimum energy needed to remove an electron from an isolated gaseous atom in its ground state to form a cation. A(g) → A⁺(g) + e⁻. Adding an electron is electron affinity. IE is an indicator of reactivity. Metals have low IE, non-metals high IE.
Explanation:
NPK is a mixed (complex) fertilizer containing nitrogen, phosphorus, and potassium. Urea is a straight nitrogenous fertilizer. Ammonium sulfate is nitrogenous. Superphosphate is phosphatic. Mixed fertilizers supply two or more primary nutrients. They can be granulated or blended. DAP provides N and P, but NPK provides all three.
Explanation:
Ethane: H₃C-CH₃. There is one C-C single bond and six C-H single bonds, total 7 covalent bonds. Each bond is a sigma bond. The structural formula shows 7 bonds. Methane has 4, propane 10. Counting bonds is simple: each line represents a covalent bond.
No comments yet. Be the first to start the discussion!