2113836
Description
Flashcards by lara.ozden, updated more than 1 year ago
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Created by lara.ozden
almost 10 years ago
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| Question | Answer |
| Mendaleev organized elements according to what? | Their Atomic Mass (bigger number) |
| Why did Mendeleev leave gaps in his model of the periodic table? | Because he had predictions as to what undiscovered element would fit there. |
| What is an atom? | The smallest part of an element. |
| What particles are in an atom (subatomic particles)? | Protons (+) & Neutrons ( ) |
| Which subatomic particle has the smallest mass? | Electron (1/1840) (negligible) |
| Where is most of the atom's mass found? | In the Nucleus |
| What is the mass number? | number of protons + neutrons (bigger number) |
| What is the atomic number? | number of protons (smaller number) |
| What is relative atomic mass | measured by the standard Carbon atom (12) |
| What makes an Isotope | a difference in neutrons |
| What is an electron configuration | the way electrons are arranged i.e. 2,4,2 |
| What is an Ion | an atom or group of atoms with positive or negative charge |
| What is a Cation | a group of positively charged ions |
| What is an Anion | a non-metal gains electrons to form a negatively charged anion. |
| What happens in Ionic Bonding | Transfer of electrons to become positively/negatively charged |
| What is the ideal number of electrons in the outer shell? | 8 |
| Na2O means what | that there are two sodium atoms for each oxygen one |
| What is a lattice structure | an arrangement of ionic compounds i.e. box-like crystals |
| Ionic Compounds usually end in what? | -ate / -ide |
| What are lattices held together by | Strong electrostatic forces |
| What determines solubility? | How easily a substance dissolves in a particular liquid |
| A salt is created how? | by reacting an acid & alkali |
| What is a precipitation reaction | soluble + soluble = insoluble |
| What does (aq) stand for | aqueous solution - dissolved |
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