What subatomic particles are found inside the nucleus?

An element is shiny, ductile, and is reactive. This element is grouped with ___.

According to the law of conservation of mass, the number of atoms of the reactants and the products should be___

Which of the following determines the reactivity of an atom?

Change of state, such as water evaporating, is an example of____.

The numbers (1-18) at the very top of the Periodic table of elements are called

Sodium (Na) belong to Group 1, while Neon (ne), belong to group 18. Which element is more reactive?

The element's identity can be determined by its ___

In an atom, the valence electrons can be found at ___

An element is dull, brittle, and not reactive. This element is a __

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