The number of protons and neutrons combined in an atom is called the mass number.
They are considered the basic units of matter because all mass is made of atoms.
Answer:
100 degree celcius, because it is the melting point of ice ob
Metal atoms have outer electrons which are not tied to any one atom. These electrons can move freely within the structure of a metal when an electric current is applied. There are no such free electrons in covalent or ionic solids, so electrons can't flow through them - they are non-conductors.
In a shorter term - no
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even no = 3/6 = 1/2
no. less than 5 = 4/6 = 2/3
