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chemistry
the chemical earth
| Question | Answer |
|---|---|
| what is an ionic compound? | a chemical compound in which ions are held together in a structure by electrostatic forces called ionic bonds. |
| what is a molecule? | a group of two or more atoms held together by chemical bonds. |
| how is a molecule different from an ion | molecules have no electrical charge |
| what is a compound? | molecule made of atoms from different elements |
| cation | atoms that have lost an electron(s) and are positively charged |
| anions | atoms that have gained an electron(s) and are negatively charged |
| Gravimetric analysis | a method for determining the quantity of a substance based on the mass of a solid. E.g a volume of water is filtered and the collected solids are weighed. |
| what is malubility? | a material, most often a metal able to be hammed or pressed into shape without it breaking or cracking |
| What is ductility? | a materials ability to be stretched into a wire |
| Atomic number | the number of protons in the atomic nucleus |
| Mass number | the number of protons and neutrons (together known as nucleons) in an atomic nucleus |
| What is a mixture? | a material made up of two or more different substances which are mixed but not combined chemically |
| What is an covalent bond? | a chemical bond that involves the sharing of electron pairs between atoms |
| What is a reliable experiment? | one where significant results are consistant (the experiment must be repeatable) |
| What is validity? | does the procedure of the experiment actually test the hypothesis that i want it to |
| electon | is a subatomic particle with the symbol e- with a negative electric charge. It has no mass |
| proton | is a subatomic particle with the symbol p+ with a positive electric charge |
| neutron | is a subatomic particle with the symbol n0 with no net electric charge. it has a mass sightly larger then a proton |
| What is a nucleon? | The collective term for protons and neutrons. |
| Do elements in the same group or period have similar reactivity? | In groups. |
| Which elements (the name for them) are the most stable? | The noble gases. |
| Which weighs less, an electron, proton or neutron? | An electron: it has relatively no weight, and electrons and protons have a similar weight. |
Created by:
zclacko
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