Criado por Matthew Bunting
mais de 3 anos atrás
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Questão | Responda |
What is the relative charge and atomic mass of the Proton | Relative charge - +1 Relative atomic mass - 1 |
What is the relative charge and atomic mass of the electron | Relative charge - -1 Relative atomic mass - 0 |
What is the relative charge and atomic mass of the neutron | Relative charge - 0 Relative atomic mass - 1 |
Where are protons and neutrons found | The nucleus |
Where are the electrons found | The outer shells |
What number determines the element | The proton number |
What are isotopes | Isotopes are elements with the same amount of protons but different amounts of neutrons |
Name features of the plum pudding model | Ball of positive charge with electrons stuck in it No nucleus - solid sphere |
Name features of the nuclear model | Dense, positively charged centre (most of the mass) Cloud of negative electrons |
Name features of the early periodic table | Arranged by order of atomic mass Only know elements used Some elements were actually compounds and/or placed in wrong group |
Name features of Mendeleev’s periodic table | Arranged by order of atomic mass Left gaps and predicted properties of other elements Grouped in similar chemical properties |
Name features of Modern periodic table | Arranged in order of atomic number Group no. = number of electrons in outer shell. Period = number of shells |
Metals form what ions | Positive ions |
What are the diatonic elements | Iodine, hydrogen, nitrogen, chlorine, oxygen, bromine |
What is the trend in reactivity with group one metals | They increases as you go down the group |
What is the trend in reactivity with the group 7 metals | They decreases as you go down the group |
What is the separating method for insoluble solids/liquids | Filtration |
What is the separating method for two different liquids | distillation |
What is the separating method for getting a solid, pure soluble salt | Crystallisation |
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