What is Period 3 on the periodic table?
Category:
science
chemistry
The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block.
Regarding this, what do Period 3 elements have in common?
ATOMIC AND PHYSICAL PROPERTIES OF THE PERIOD 3 ELEMENTS It covers ionisation energy, atomic radius, electronegativity, electrical conductivity, melting point and boiling point.
Just so, why is sodium in Period 3 of the periodic table?
These low melting and boiling points are typical of non-metals. Argon, chlorine, sulfur and phosphorus are non-metals. On the left hand side of period 3 we find the elements sodium, magnesium and aluminium. The high melting points suggest that the force of attraction between the "atoms" making up the solids are strong.
Phosphorous is the 5th element from the left in the third period so it has five valence electrons.