atoms and periodic table

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What is the name of group 2 on the periodic table?

The smallest building block of matter

This scientist discovered neutrons and added them to Rutherford's model.

Scientist who stated that atoms are like chocolate chip cookie dough, with the chocolate chips being the electrons he discovered.

This number tells you how many protons or electrons and atom of an element has.

Scientist who stated that atoms are small and indestructible like small spheres.

If the atomic number of helium is 2 and the mass number is 4, then how many neutrons does helium have?

Part of an atoms that is positively charged and located in the nucleus