Answer:
mass is a measure of the amount of matter in a sample or object. It is measured in grammes or kilogrammes
Explanation:
The bone Wich is answer A
An exothermic reactions experiment and endothermic reactions experiment.
Noble gases belong to group 18 of the periodic table. These elements are inert because they have their valence orbital shells as ‘full’ hence do not participate in reactions since they cannot share electrons. These elements have a pattern in their electron configuration. Their outer most orbital shells has 8 electrons (with the exception of 2 for helium).