Two or more atoms that have been chemically combined are called a
molecule
formula
poly atom
mixture

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

Explanation:

i think its mixture.

pe = weightxheight = 2000x1000=2,000,000joules

its a 5.5 n

glad that