AQA GCSE Chemistry - Atomic Structures All Answers Correct

AQA GCSE Chemistry - Atomic Structures All Answers Correct 1. What is the fundamental building block of all substances? Answer: Atoms. 2. What defines an element? Answer: An element is a substance composed of only one type of atom. 3. How many elements are recognized in the current scientific understanding? Answer: There are approximately 100 known elements. 4. What is the comprehensive chart that organizes elements? Answer: The periodic table displays all elements in a organized and systematic manner. 5. What proportion of the periodic table is occupied by metals? Answer: Metals account for about three-quarters of the periodic table, from left to right. 6. How are elements grouped on the periodic table? Answer: Elements with similar properties are grouped together into categories called groups or columns. 7. How are these groups represented on the periodic table? Answer: Each group is represented as a vertical column on the periodic table. 8. What notation is used to represent atoms of each element? Answer: Chemical symbols are used to represent atoms of each element. 9. What does the chemical symbol 'O' represent? Answer: The chemical symbol 'O' represents an atom of oxygen. 10. What does the chemical symbol 'Na' represent? Answer: The chemical symbol 'Na' represents an atom of sodium. 11. What is at the center of an atom? Answer: The nucleus is at the center of an atom. 12. What makes up the nucleus? Answer: The nucleus is composed of protons and neutrons. 13. What orbits around the nucleus? Answer: Electrons orbit around the nucleus of an atom. 14. What is the charge of a proton? Answer: A proton has a charge of +1. What is the charge of an Electron? ️-1 What is the charge of a neutron? ️0 What is the charge of an atom ️0 What is the weight of an Electron? ️(Considered to be) 0 What is the weight of a proton? ️1 What is the weight of a neutron? ️1 What is the number of protons in an atom referred to as? ️Atomic (Proton) number How is the mass number calculated? ️(Number of) neutrons + (number of) protons Where is the atomic number written with regards to the chemical symbol? ️Below Where is the mass number written with regards to the chemical symbol? ️Above What do electrons occupy? ️Shells Which shell is occupied first? ️(The) innermost shell What is the electronic structure of the first three shells when they are all full? ️2,