General Chemistry

The chemical symbol for gold is 'Au', derived from the Latin word 'Aurum'.

Helium is a noble gas, which means it is chemically inert and found in Group 18 of the periodic table.

Pure water has a pH of 7, which is neutral on the pH scale.

Calcium is essential for bone strength and is a major component of bones and teeth.

Methane (CH₄) is the primary component of natural gas, typically making up 70-90% of its composition.

Sodium chloride (NaCl) is commonly known as table salt, used in food and various industrial processes.

Hydrogen has the atomic number 1, making it the lightest and most abundant element in the universe.

The chemical symbol for iron is 'Fe', derived from the Latin word 'Ferrum'.

Mercury is the only metal that is liquid at room temperature.

Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas.

Vinegar contains acetic acid, which gives it its sour taste and pungent smell.

The chemical formula for sulfuric acid is H₂SO₄, a strong mineral acid.

Sodium is an alkali metal, found in Group 1 of the periodic table.

Bromine is the only non-metal that is liquid at room temperature.

Carbon dioxide (CO₂) is released as a byproduct during respiration in humans and animals.

Tungsten is used in light bulb filaments due to its high melting point and durability.

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

Water (H₂O) is a compound made up of hydrogen and oxygen atoms.

A catalyst is a substance that increases the rate of a chemical reaction without being consumed.

Carbon dioxide (CO₂) turns lime water milky due to the formation of calcium carbonate.

As of now, there are 118 confirmed elements in the periodic table.

Zinc is commonly used in batteries, such as zinc-carbon batteries.

Glucose is the primary simple sugar used by the body for energy.

Oxygen is essential for respiration in humans and most living organisms.

The melting point of ice is 0°C (32°F) at standard atmospheric pressure.

Uranium is commonly used as fuel in nuclear reactors due to its fissile properties.

Carbon dioxide (CO₂) is used to carbonate soft drinks, giving them their fizz.

Silicon is a metalloid, exhibiting properties of both metals and non-metals.

The chemical symbol for potassium is 'K', derived from the Latin word 'Kalium'.

Sulfuric acid (H₂SO₄) is used in lead-acid car batteries as the electrolyte.

A liquid has a fixed volume but takes the shape of its container.

The SI unit of temperature is Kelvin (K), used in scientific measurements.

Carbon dioxide (CO₂) is a major greenhouse gas that contributes to global warming.

Elements in the same group of the periodic table have similar chemical properties due to their identical valence electron configurations.

Lemons contain citric acid, which gives them their sour taste.

Helium is used in balloons because it is lighter than air and non-flammable.

Electrons are negatively charged particles that orbit the nucleus of an atom.

Air is a mixture of gases, primarily nitrogen and oxygen.

A solute is a substance that dissolves in a solvent to form a solution.

The nucleus of an atom contains protons and neutrons.

The mass of an atom is mostly concentrated in the nucleus, which contains protons and neutrons.

Oxygen (O₂) is a diatomic molecule, meaning it exists as two atoms bonded together.

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Sodium is highly reactive, especially with water, due to its position in the alkali metals group.

Evaporation is the process by which a liquid turns into a gas at temperatures below its boiling point.

Acetylene is commonly used in welding due to its high flame temperature.

Hydrogen is the lightest element, with an atomic number of 1 and an atomic mass of approximately 1.008.

Salt (sodium chloride) is commonly used as a preservative in food to prevent spoilage.

Copper sulfate solution is blue due to the presence of copper(II) ions.