what is the symbol of the element in period 5 and Group 2A? Be Mg Ca Sr Si in an

Question

what is the symbol of the element in period 5 and Group 2A? Be Mg Ca Sr Si in an atom, the nucleus contains an equal number of protons and electrons all the protons and neutrons all the protons and electrons an equal number of protons and neutrons only protons The Rutherford gold foil experiment demonstrated that atom consist of an almost empty nucleus surrounded by a dense c are homogeneous. are visible to the naked eye. consist of a dense nucleus surrounded by mostly empty sp consist of a single type of subatomic particle. The atomic number of an atom is equal to the number c nuclei neutrons neutrons plus protons electrons plus protons protons The number of neutrons in an atom is equal to the A) atomic number mass number mass number + the atomic number mass number - the atomic number number of protons

Explanation / Answer

Solution:

23. The answer is D.Sr - Strontium. In the periodic table the Columns are numberd as 1A, 2A respectivly and rows are numbered as group 1, 2 and so on. The thing you have to do is Check Group 5 and 2A which element is there at this position.

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