2. Many rings and other jewelry are made of gold. Gold can be found on the periodic table as Au. It has a melting point of 1337K and a boiling point of 3234K. What is gold classified as? A. An element B. A Compound
C. A Homogenous Mixture D. A Heterogeneous Mixture

A. An element.

As long as it's on the periodic table, it's always an element.

A compound is made up of two or more elements in a chemical reaction, resulting in covenant and/or ionic bonds.

A homogenous mixture (a solution) is a combination of two or more elements physically without causing a reaction (like salt water or applejuice).

Heterogeneous mixtures are physical combinations that mix but don't appear uniform (think of cereal in milk.)

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.