Question

1. as a group, discuss some examples of each:

elements -

atoms -

compounds -

molecules -

Explanation:

• Elements: Substances made of only one type of atom. Examples: Hydrogen ($\ce{H}$), Oxygen ($\ce{O}$), Carbon ($\ce{C}$), Gold ($\ce{Au}$), Iron ($\ce{Fe}$).
• Atoms: The basic units of matter. Examples: A single hydrogen atom ($\ce{H}$), a single oxygen atom ($\ce{O}$), a single carbon atom ($\ce{C}$).
• Compounds: Substances made of two or more different elements chemically bonded. Examples: Water ($\ce{H_2O}$), Carbon Dioxide ($\ce{CO_2}$), Sodium Chloride ($\ce{NaCl}$), Glucose ($\ce{C_6H_{12}O_6}$).
• Molecules: A group of atoms bonded together (can be same or different elements). Examples: Oxygen molecule ($\ce{O_2}$), Nitrogen molecule ($\ce{N_2}$), Water molecule ($\ce{H_2O}$), Methane ($\ce{CH_4}$).

Answer:

• Elements: Hydrogen ($\ce{H}$), Oxygen ($\ce{O}$), Carbon ($\ce{C}$), Gold ($\ce{Au}$), Iron ($\ce{Fe}$)
• Atoms: A single $\ce{H}$ atom, a single $\ce{O}$ atom, a single $\ce{C}$ atom
• Compounds: $\ce{H_2O}$, $\ce{CO_2}$, $\ce{NaCl}$, $\ce{C_6H_{12}O_6}$
• Molecules: $\ce{O_2}$, $\ce{N_2}$, $\ce{H_2O}$, $\ce{CH_4}$