Silver has 47 electrons.
photon
Kr has the atomic number of 36. It has similar number of electrons and protons.
Gallium
The number of protons in its nucleus, the number of electrons it has and its name.
Neutrons. If the differ in electrons they are not neutral and if they differ in protons then they are no longer the same element as the number of protons determines the name of the element.
From the element name go to the periodic table and look for the atomic number. This is equal to the number of protons and to keep the atom neutral is also equal to the number of electrons.
Neon-10 has more electrons because neon-10 has 10 electrons, while neon-12 has 10 electrons. The number after the element name indicates the total number of protons and neutrons in the nucleus, not the number of electrons.
Calcium
'S' look for it on the periodic table for full name.
protons,neutrons,electrons, and the element name
The element name for element number 31 is Gallium.
On the periodic table it is above the letter name of the element. I don't know where else you would find a an atomic mass of an element. The atomic number tells how many protons and electrons are inside. The amount of protons and electrons are always the same.