Grade 7 Science Q1 Ep5: Properties of Elements and Compounds

Periodic table

A tool that helps identify elements and provides information about their symbol, group, period, atomic number, atomic mass, and uses.

Copper

An element with the symbol Cu, belonging to group number eleven and period four on the periodic table.

Compound

A substance composed of atoms of two or more elements that are chemically bonded together.

Element

A pure chemical substance made up of only one type of atom.

Group

A classification of elements on the periodic table based on similar properties.

Period

A row of elements on the periodic table.

Oxygen

An element that is not a compound, symbolized by the letter O.

Metal

A group of elements characterized by their shiny appearance, conductivity, and malleability.

Non-metal

A group of elements that are generally poor conductors of heat and electricity.

Metalloid

A group of elements that have properties of both metals and non-metals.

Chemical process

A reaction or transformation that occurs when substances combine or break apart chemically.

Substance

A type of matter that has a specific composition and distinct properties.

Mixture

A combination of two or more substances that are not chemically bonded together.

Chlorine

An element mentioned in the poem, a poisonous gas.

Sodium

An element mentioned in the poem, a shiny metal.

Table salt

A compound formed by the combination of chlorine and sodium.

Rust

A compound formed by the reaction of iron with oxygen.

Alcohol

A compound mentioned in the poem.

Water

A compound composed of hydrogen and oxygen.

Property

A characteristic or attribute of a substance or object.

Atom

The basic unit of matter, consisting of a nucleus (protons and neutrons) surrounded by electrons.

Chemical formula

A representation of a compound using symbols and subscripts to indicate the types and number of atoms present.

Assessment

A set of questions or tasks used to evaluate understanding or knowledge.

Iron oxide

A compound that gives Mars its red color and is also found in blood and rust.

Mars

The fourth planet from the sun, named after the Greek god of war.

NASA

The National Aeronautics and Space Administration, responsible for organizing future missions to Mars.

Volcanic eruptions

The release of magma, gases, ash, and rocks from a volcano due to pressure and density.

Magma

Molten rock formed when Earth's mantle melts.

Elements

Substances that cannot be broken down into simpler substances and are essential for living.

Compounds

Substances made up of two or more elements chemically combined.

Minerals

Essential elements found in vegetables that are important for nutrition.