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Description
Flashcards by charlotte.dredge, updated more than 1 year ago
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Created by charlotte.dredge
about 9 years ago
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| Question | Answer |
| How are the elements of the Periodic Table arranged? | Elements are arranged in order of increasing atomic mass, in periods so that those with similar chemical properties are in the same group |
| What are the properties of the groups? (1, Central Block, 7 and 0) | Metals are in Groups 1, 2 and Central Block Group 1 = Alkali Metals Group 2 = Halogens Group 0 = Noble Gases Central Block = Transition Metals |
| What are the trends of Periods and Groups? (1, 7 and 0) | Groups have the same number of electrons on their outer shell The mass of elements get bigger from left to right on a period Group 1 = more reactive as you go down Group 7 = less reactive as you go down Group 0 = full outer shell, unreactive |
| What is the Atomic Number and Mass Number? | Atomic Number of an element is the smaller number at the bottom. It shows how many protons there are in an atom of an element The mass number is at the top and is the larger of the two. It shows how many protons and neutrons there added together in an atom of an element. |
| What is an Isotope? Does being one affect the atoms chemical properties? | It is an atom with a differing number of Neutrons to other atoms of the same element. They have the same electronic configuration, so they still react the same. The mass number changes only. |
| What does the Electronic Configuration show? | It shows how the electrons are arranged around the Nucleus of an atom on shells. |
| What is Relative Atomic Mass? | RAM is the weighted average for the different isotopes of an element. Takes into account the Relative Isotopic Masses and the abundance of each. |
| How doe you work out RAM? | (% of isotope 1 × mass of isotope 1) + (% of isotope 2 × mass of isotope 2) ÷ 100 Example: In any sample of Chlorine 25% will be 37Cl and 75% 35Cl. (25 × 37) + (75 × 35)∕100 = 925 + 2625∕100 = 35.3 |
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