Question

e) copper reacts with oxygen to form a green compound
f) ability to burn

g) water boils at 212 degrees f.

h) iron is ductile and malleable

i) an iron nail rusts

j) combustion of wood

k) green color of leaves

l) density of water is 1.00 g/ml

m) copper conducts electricity

n)salt is soluble in water

o) honey is viscous

1. classify the following as an element or a compound,

a. aluminum:

a. nacl:

b. co₂:

c. cu:

intermolecular force (force between molecules) and intramolecular forc
within a molecule).

Explanation:

The problem involves classifying substances as elements or compounds. An element is a pure substance made of only one type of atom. A compound is a pure substance made of two or more different elements chemically combined.

• Aluminum (Al) is an element as it consists of only aluminum atoms.
• NaCl (Sodium Chloride) is a compound as it is made of sodium (Na) and chlorine (Cl) atoms chemically bonded.
• CO₂ (Carbon Dioxide) is a compound as it is made of carbon (C) and oxygen (O) atoms chemically bonded.
• Cu (Copper) is an element as it consists of only copper atoms.

Answer:

a. Aluminum: element
a. NaCl: compound
b. CO₂: compound
c. Cu: element