Answer:An element has an atomic mass number of 16 and an atomic number of 7
The element has 7 protons and 9 neutrons
The element with atomic mass number 16 and atomic number 7 will have 7 protons and 9 neutrons.
The number of protons in the nucleus of an atom is referred to as its atomic number. This measure can be used to distinguish one element from the other.
The modern periodic table is organised in a manner of increasing atomic numbers. There are electrons, protons and neutrons in an atom and the number of electrons in an atom's outermost shell is known as the valency of that atom.
The number of protons added to the number of neutrons is referred to as the mass number.
Valency is associated with the number of electrons and mass number and atomic number is associated with the number of protons and neutrons.
The atomic number is denoted by Z and the mass number is denoted by A. The protons and neutrons together in the nucleus are referred to as nucleons.
However, different atoms of the same element can have different numbers of neutrons. So the mass number varies with atoms.
Therefore, the atom has 7 protons and 9 neutrons.
Read more about the mass number and atomic number, here
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