Question

write a complete chemical formula, including physical state symbol, for each element listed below in its standard state. the first row of the table has been completed for you. element formula iron fe(s) phosphorus neodymium chlorine

Explanation:

Step1: Recall phosphorus standard - state

Phosphorus exists as white - phosphorus ($P_4$) in solid state at standard conditions.
$P_4(s)$

Step2: Recall neodymium standard - state

Neodymium is a metal and exists as a solid in its standard state.
$Nd(s)$

Step3: Recall chlorine standard - state

Chlorine is a diatomic gas in its standard state.
$Cl_2(g)$

Answer:

phosphorus: $P_4(s)$
neodymium: $Nd(s)$
chlorine: $Cl_2(g)$