Question

essay questions. directions: below are essay questions you may encounter on your test. please prepare your answers now and use this sheet to help you write your answers on the test. please answer the following essay questions. use 2 - 5 sentences to explain your thinking. 1 moving from the element with atomic number 10 to atomic number 11 on the periodic table, there is a change in reactivity. in three to five sentences, identify the direction of the change, and give two reasons for the change. 2 the periodic table is arranged by various patterns. is there a pattern with regard to ionic charge? in three to five sentences, explain your reasoning and provide specific examples.

Explanation:

1. As atomic number increases from 10 (Neon) to 11 (Sodium), reactivity changes. Neon is a noble - gas with a full outer electron shell, making it unreactive. Sodium, with one valence electron, is highly reactive as it readily donates this electron to achieve a stable electron configuration. The direction of the change is from low reactivity (non - metal noble gas) to high reactivity (metal). Reasons for the change include the difference in valence electron numbers and the desire of atoms to achieve a stable electron configuration.
2. The periodic table is arranged by atomic number. Regarding ionic charge, metals in Group 1 (like sodium) tend to form + 1 ions by losing their single valence electron, while non - metals in Group 17 tend to form - 1 ions by gaining one electron to complete their outer shell. There is a pattern in that metals generally form positive ions and non - metals form negative ions as you move across the periodic table from left to right.

Answer:

1. The reactivity increases when moving from an element with atomic number 10 (Neon) to atomic number 11 (Sodium). Neon is a noble gas with a stable electron configuration and low reactivity. Sodium, as an alkali metal, has one valence electron and is highly reactive to achieve a stable state. Reasons: change in valence electron number and the drive for a stable electron configuration.
2. Yes, there is a pattern regarding ionic charge. Metals on the left - hand side of the periodic table tend to form positive ions (e.g., sodium forms Na⁺), and non - metals on the right - hand side tend to form negative ions (e.g., chlorine forms Cl⁻) as they strive to achieve a full outer electron shell.