Classify each of the following pure substances as an element or a compound: neon gas (Ne), mercury (Hg) in a thermometer, glucose (C6 H1206), sulfur (S), lye (KOH).
sulfur S
neon gas Ne
mercury (Hg) in a thermometer
lye кон
Sulfur (S) - Element
Neon gas (Ne) - Element
Mercury (Hg) in a thermometer - Element
Glucose (C6H12O6) - Compound
Lye (KOH) - Compound
sulfur (S) - element
neon gas (Ne) - element
mercury (Hg) in a thermometer - element
glucose (C6H12O6) - compound
lye (KOH) - compound
To classify each of the substances, we need to understand the definitions of elements and compounds.
An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom. Examples of elements include hydrogen (H), oxygen (O), and sulfur (S).
A compound, on the other hand, is a pure substance composed of two or more different elements chemically bonded together in a fixed ratio. Compounds can be broken down into their constituent elements through chemical reactions. Examples of compounds include water (H2O), glucose (C6H12O6), and potassium hydroxide (KOH).
Now, let's classify each substance:
1. Neon gas (Ne): Neon is found on the periodic table as an element with the symbol Ne. Therefore, it is classified as an element.
2. Mercury (Hg) in a thermometer: Mercury is also an element, indicated by its symbol Hg. It exists in elemental form in thermometers.
3. Glucose (C6H12O6): Glucose is a compound composed of the elements carbon (C), hydrogen (H), and oxygen (O) in a fixed ratio. Therefore, it is classified as a compound.
4. Sulfur (S): Sulfur is an element, denoted by the symbol S. It exists in its pure form and does not require any other elements to form a compound.
5. Lye (KOH): Lye, or potassium hydroxide, is a compound consisting of the elements potassium (K), oxygen (O), and hydrogen (H) in a fixed ratio. Therefore, it is classified as a compound.
To summarize: Neon gas, mercury, and sulfur are elements, while glucose and lye are compounds.