The picture shows the symbol for sodium. What can be concluded about sodium from the symbol?

Question

MCQ (Single)Atomic Number of ElementsMass Number of Atoms

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Atomic number (Z) is equal to _____

Study the data given below and answer the questions which follow:

Mass Number of Atoms

Isotopes and Their Properties

Determine the valency of the following atoms: X, Y, Z, W

Write down the electron distribution of the Phosphorus atom. How many electrons are there in the M shell? (Atomic number of phosphorus is 15).

Can an element exist with an atom containing one electron, one proton, and no neutron? If so, name the element.

How many protons, electrons, and neutrons are present in X⁻ if the atomic number of X is 17 and the mass number is 35?