Chemical Elements, Compounds, and Applications Quiz

Helium is a noble gas due to its full valence electron shell, making it stable and non-reactive.

Gold's chemical symbol is Au, derived from the Latin word 'aurum.'

Carbon has an atomic number of 6, indicating it has six protons in its nucleus.

Hydrogen sulfide (H2S) is responsible for the smell of rotten eggs due to its characteristic odor.

The common name for NaCl is sodium chloride, commonly known as table salt.

Iron has the chemical symbol Fe, derived from its Latin name 'ferrum.'

Water is called the universal solvent because it can dissolve a wide variety of substances due to its polar nature.

The molecular formula of sulfuric acid is H2SO4, representing its composition of two hydrogen atoms, one sulfur atom, and four oxygen atoms.

Alkali metals belong to Group 1 of the periodic table due to their similar chemical properties, including strong reactivity with water.

Methane (CH4) is the primary component of natural gas, comprising over 90% of its composition.

The molecular formula of methane is CH4, composed of one carbon atom bonded to four hydrogen atoms.

Freon, specifically chlorofluorocarbons (CFCs), has been traditionally used as a refrigerant in air conditioning systems.

Mercury is often used in fluorescent lights and television screens due to its ability to emit ultraviolet light when excited.

Carbon is essential for photosynthesis in plants as it serves as the building block for organic molecules.

Nitrogen is the most abundant gas in the Earth's atmosphere, comprising about 78% of its volume.

Chromium is added to steel to make it stainless by forming a thin, protective oxide layer on its surface.

Lithium is commonly used in batteries due to its high energy density and electrochemical properties.