Question

which of the following elements is not a metal? view available hint(s) iron aluminum sodium phosphorus submit part d which of the following is not an element? view available hint(s) water lithium sulfur lead

Explanation:

First Question (Which of the following elements is not a metal?):

Metals are elements that typically have metallic luster, are good conductors of heat and electricity, and are malleable and ductile. Iron (Fe), aluminum (Al), and sodium (Na) are all metals. Phosphorus (P) is a non - metal as it does not exhibit the typical properties of metals.

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Lithium (Li), sulfur (S), and lead (Pb) are all elements. Water ($H_2O$) is a compound made up of hydrogen and oxygen atoms, so it is not an element.

Answer:

D. phosphorus

Second Question (Which of the following is not an element?):