1. (D) atomic number 2. (A) down a group and from right to left across 3. (C) halogens 4. (A) Sr Because of the formula MCl₂, M is Group II. In Group II, Ca, Sr...
(a) oxygen (b) silver (c) hydrogen (d) sodium or potassium (e)(i) Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g) (e)(ii) Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s) (f) Only the oxide of metal A decomposes on heating to give metal...
(a) silver (b) copper(II) ion (c) Cu(s) + 2Ag⁺(aq) → Cu²⁺(aq) + 2Ag(s) (d) In Test 1, copper cannot displace zinc from zinc nitrate solution. Therefore, copper is less reactive than zinc. In Test 2, copper can displace...
a) (i)（這個要背出來啊...） 1) Moisten a clean platinum/nichrome wire with concentrated hydrochloric acid. 2) Dip the wire into a crushed sample. 3) Heat the end of the wire strongly with a non-luminous flame. (ii) P: sodium Q: Calcium b) P...
... in the soil) acid rain use of fertilizer (fertilizer is acidic) In order to neutralize the soil, calcium carbonate (limestone) or calcium hydoxide (slaked lime...
... pressure increases, the equilibrium position shifts to the left in order to decrease the number of gaseous particles. This leads...
... is "(prop-2-enyl)-" according to alphabetical order , (methylethyl)- should come before (prop-2-enyl)- 中文： 根據序列法則判斷 圖片參考...
... acidic. The farmer adds lime (calcium oxide) to the soil, in order to neutralize the excess acid in the soil as the lime is basic. The excess...
...out every single factor that may cause inaccuracy in experimental results. In order to safeguard the accuracy and reliability of experimental results, we should use only...
