Question

Unknown elements Wand X interacted to form a new substance. This indicates that

Wand X must have experienced a-
a) Chemical change
b) Physical change
c) Biological change
d) Nuclear change

Answer 1

Elements W and X forming a new substance denotes a chemical change, where the original substances are transformed into new substances with different properties.

Step-by-step explanation:

The interaction of unknown elements W and X to form a new substance is an indication of a chemical change. A chemical change, also known as a chemical reaction, occurs when substances are transformed into new substances with different properties. This is in contrast to a physical change, where the substance's form may alter (like melting or boiling) but its molecular structure remains the same. For example, the burning of wax to generate water and carbon dioxide is a chemical reaction because it involves the formation of new substances with different chemical properties.