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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Describe alkali metals |
In group 1 of the periodic table. Violently react with water or air. Dont like to be in their metal form in the atmospehre or water. They lose electron and stay in positively charged form |
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Describe alkaline earth metals |
Reactive metals, need to lose 2 electrons to be stable |
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Describe Transition metals |
their d-shell external electrons are buried underneath their s and p-shells, thus metals in the same group react in the same way, bury electrons that show their characterisitics below SNP shell. Electrons can jump back up and change their characteristics. |
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Describe post transition metals |
Also known as p-shell metals: they are separately classified because of their diminished metallic nature. |
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Describe halogens |
the most reactive and energetic gases, corrosive, gain 1 electron to be stable |
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Describe noble gases |
the least reactive elements, stable electron arrangement |
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What are lanthanides and actinides |
actinides - unstable and radioactive Behave like transition metals but worse. Hide their external shell. Almost impossible to separate f-shell metals from their neighbours in nature. |
f-shell metals |
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Describe metalloids Describe metalloids |
they show properties in between those of metals and non-metals. Created to bring together similar elements |
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Why do syntehtic metals decay as soon as they form |
They have a unstable nucleus |
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Alkaline, alkali earth and transition metals tend to be found as.... |
cations |
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Non-metal elements tend to be found as.... |
anions |
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Name some elements that are essential for biological systems |
oxygen, hydrogen, carbon, nitrogen sodium, potassium, calcium, magnesium, phosphorous, sulphur |
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why are metals compatable with biological systems |
loss of electrons, create a sea of delocalised electron and can form cations, compatible with water-based substances. Anions are non-harmful. |
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Why is H, C,N and O really suitable for life |
form stable covalent bonds hydrogen bonds weak enough to hold macromolecules together but strong enough to hold life together. |
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