The Atom 0.0 / 5 ? ChemistryAtomsGCSEAQA Created by: hajrak.ouCreated on: 30-12-23 18:52 What is an atom ? Smallest part of an element that can exist . 1 of 26 What is Daltons model of the atom ? Atoms as solid spheres that could not be divided into smaller parts . 2 of 26 What is the plum pudding model of the atom ? Sphere of positive charge with negative electrons embedded in it . 3 of 26 What did scientists discover in the alpha scattering experiment . Most alpha particles went through the gold foil but some deflected due to the alpha particles hitting the dense nucleus . 4 of 26 Describe the nuclear model of the atom ? Dense nucleus with electrons orbiting it . 5 of 26 What did bohr discover ? Electrons orbit in shells . 6 of 26 What did chadwick discover ? Uncharged particle called the neutron. 7 of 26 Where are protons and neutrons? In the nucleus. 8 of 26 What is the relative mass of each sub-atomic particle ? Proton - 1Da Electrons-0 Neutron - 1Da 9 of 26 What is the relative charge of each sub-atomic particle. Proton - +1 Neutron- 0 Electron - -1 10 of 26 How can you find out the number of protons in a atom ? The atomic number on the periodic table . 11 of 26 How can you calculate the number of neutrons in an atom ? Mass number - atomic number 12 of 26 Why do atoms have no overall charge ? Equal number of positive protons and negative electrons . 13 of 26 What is an element ? Substance made of one type of atom . 14 of 26 What is a compound ? Substance made of more than one type of atom chemically joined together. 15 of 26 What is a mixture ? Two or more substances not chemically combined . 16 of 26 What are isotopes? Atoms of the same element with different number of neutrons. 17 of 26 What physical processes can be used to separate mixtures ? Filtration,crystallisation,distillation, chromatography,fractional distillation 18 of 26 What is the size of an atom radius ? -10 1x10 m 19 of 26 What is the radius size of a nuclei ? -14 1x10 m 20 of 26 What dose filtration do ? Separate insoluble solids and a liquid . 21 of 26 What dose crystallisation do ? Separates soluble solids from a solution 22 of 26 What dose distillation do ? Separates solvent from a solution . 23 of 26 What dose fractional distillation do ? Separates two liquids with similar boiling points . 24 of 26 What dose paper chromatography do ? Identifies substances from a mixture in a solution. 25 of 26 How do calculate Rf value ? Distance moved by solute / distance moved by solvent 26 of 26
Comments
No comments have yet been made