How are elements in the modern periodic table arranged?
Elements are arranged in rows, referred to as periods, of increasing atomic number. To recap, atomic number is the number of protons in the nucleus of an atom. Elements are also arranged in columns, referred to as their group. Elements in the same group have similar properties, all with the same number of outer shell electrons. For example, elements in group 2 have 2 outer electrons in their shell.
AG
Related Chemistry GCSE answers
All answers ▸An equation for the reaction is: NiO + C = Ni + CO Calculate the percentage atom economy for the reaction to produce nickel. Relative atomic masses (Ar): C = 12 Ni = 59 Relative formula mass (Mr): NiO = 75 Give your answer to 3 significant figures.
Which of the Group 7 elements has the highest boiling point and why?
How does a metal in powder form react faster with acid than the same metal in strips/blocks?
How would you preform the flame test to identify the presence of Sodium in a solution? (3Marks)