| What is observed when Group 2 nitrate s heated. Identify the observation. | A brown gas in observed.
Brown gas = toxic nitrogen doixide |
| What is observed when Group 2 nitrate s heated. Identify the observation. | A brown gas in observed.
Brown gas = toxic nitrogen doixide |
| Group 2 of the Periodic Table is also known as... | Alkaline earth metals |
| What is the electron configuration of Beryllium (Be) | 1s² 2s² |
| What is the electron configuration of Magnesium (Mg) | 1s² 2s² 2p⁶ 3s² |
| What is the electron configuration of Calcium (Ca) | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² |
| What is the electron configuration of Strontium (Sr) | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 5s² |
| What is the electron configuration of Barium (Ba) | 1s²2s2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶6s² |
| What is the metallic radius | Half the distance between the nuclei in a giant metallic lattice |
| Atoms of group 2 elements get larger going down the group, why? | Outer 2 electrons occupy a new principle quantum shell that is further away from the nucleus |
| Group 2 metals form .... compounds | ionic |
| What happens when group 2 metals react? | Their atoms lose the 2 electrons from their outermost s sub-shell and form an ion with a stable electronic configuration of a noble gas. This creates a 2+ ion |
| Do Group 2 metals act as a oxidation or reducing agent | reducing |
| Group 2 metals act as a reducing agent. How? | Their atoms donate (give away) electrons and so they are oxidised themselves as they react to form their 2+ ions |
| Metals in Group 2 get more/less reactive down the group | more reactive |
| The group 2 sulfates get more/less soluble down the group | less soluble |
| Group 2 metals burn in air, and burn more rapidly in ..... gas. The metals form .......... ........... ......... | Oxygen gas
White solid oxides |
| Group 2 metals get more/less reactive with oxygen going down the group. | more reactive |
| We can test for calcium, strontium and barium ions in compounds using flame test | A nichrome wire, cleaned with concentrated hydrochloric acid, is dipped into a sample of salt to be tested and heated in a non-luminous Bunsen flame. |
| When we test for calcium using a flame test. What colour does the calcium compound give off | Calcium compounds give a brick-red colour |
| When we test for strontium using a flame test. What colour does the strontium compound give off. | Strontium compound give a scarlet/red colour |
| When we test for barium using a flame test. When colour does barium compound give off? | Barium compound give an apple-green colour |
| Basic oxides of the group 2 metals can be neutralised by ... | dilute acid |
| Basic oxides of the group 2 metals can be neutralised by dilute acid. The general equation for the reaction of a basic oxide is: | Basic oxide + dilute acid → a salt + water |
| Oxides of calcium (CaO), strontium (SrO) and barium (BaO) are also neutralised by...... | Dilute hydrochloric acid |
| When magneium and steam react when does it produce | Magnesium oxide (a white solid) and hydrogen gas |
| What happens when calcium reacts with water at room temperature. | This reaction gives off a steady stream of hydrogen gas and forms a cloudy white suspension of slightly soluble calcium hydroxide. The calcium hydroxide that does dissolve forms a solution that we call 'limewater', which the solution weakly alkaline |
| A saturated solutions of magnesium hydroxide will have pH of about | 10 |
| Solutions formed from the reaction of the Group 2 metal oxides with water get more ............. going down the group | alkaline |
| Solubility of group 2 hydroxides increases/decreases going down Group 2 | Increases |
| The alkaline hydroxides of the group 2 metals will all be neutralised by dilute acid: what is this formula | Hydroxide + dilute acid → a salt + water |
| Group 2 Carbonates have the general formula | XCO₃ |
| Carbonates of magnesium, calcium, strontium and barium are all ...... in water | insoluble |
| Carbonates and nitrates of the Group 2 elements decompose when .... | heated |
| Temperature at which thermal decomposition of the Group 2 carbonates take place ............ going down Group2 | Increases |
| What is observed when Group 2 nitrate s heated. Identify the observation. | A brown gas in observed.
Brown gas = toxic nitrogen doixide |
| Going down Group 2 from magnesium to barium, the atomic radius increases. Why? | THis is due to the addition of an extra principal quantum shell of electrons for the atoms of each element as the group descended |
