Ch 17 vocab science

Metals

Elements that are shiny, malleable, ductile, and good conductors of heat and electricity

Malleable

They can be hammered or rolled into sheets

Ductile

They can be drawn into wires

Metallic bonding

Positively charged metallic ions are surrounded by a sea of electrons

Radioactive element

Is one in which the nucleus breaks down and gives off particles and energy

Transition elements

The elements in groups 3-12 in the periodic table

Nonmetals

Elements that are usually gases or solids at room temperature

Diatomic molecule

Consists of two atoms of the same element in a covalent bond

Metalloids

Elements that have some properties of metals and some properties of nonmetals

Allotropes

Different molecular structures of the same element

Semiconductors

Elements that conduct an electric current under certain conditions

Transuranium elements

Elements that have more than 92 protons

Metals

Elements that are shiny, malleable, ductile, and good conductors of heat and electricity

Malleable

They can be hammered or rolled into sheets

Ductile

They can be drawn into wires

Metallic bonding

Positively charged metallic ions are surrounded by a sea of electrons

Radioactive element

Is one in which the nucleus breaks down and gives off particles and energy

Transition elements

The elements in groups 3-12 in the periodic table

Nonmetals

Elements that are usually gases or solids at room temperature

Diatomic molecule

Consists of two atoms of the same element in a covalent bond

Metalloids

Elements that have some properties of metals and some properties of nonmetals

Allotropes

Different molecular structures of the same element

Semiconductors

Elements that conduct an electric current under certain conditions

Transuranium elements

Elements that have more than 92 protons