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Periodic table Grace

QuestionAnswer
Atoms with the same number of protons but different numbers of neutrons are called? Isotopes
The average mass of all the isotopes of an element is called the element's atomic mass atomic mass
The most reactive group of metals in the periodic table is the Alkaili metals
The most reactive group of nonmetals whose atoms gain or share one electron in chemical reactions are the? halogens
The spontaneous emission of radiation by an unstable atomic nucleus is called? radioactivitity
Non metals can be hammered into thin sheets true
Tracers can be uses to follow the steps of a chemical reaction True true
In an atom, the number of protons is equal to the number of electrons. true
It is impossible to predict the properties of any element by its postition in the periodic table. false
Created by: 616280145
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