Science 8 Periodic Table

Identifies the number of protons in an element

A positively or negatively charged atom

A type of chemical bond formed by atoms when they share electrons

The force that hold together the atoms in a compound; lose, gain, and share electrons

Part of the atom with a neutral electrical charge (Shown in green)

The ability of an object to transfer heat or electricity to another object

A statement that tells which elements are in a compound and their ratios

On the Periodic Table, poor conductors of electricity & heat and are reactive w/ other elements

The sum of protons and neutrons in the nucleus of an atom

On the Periodic Table of elements, Group 1, react by losing 1 electron, most reactive metals

Atoms with the same number of protons and a different number of neutrons

On the Periodic Table of Elements, Group 17, very reactive, uncombined are dangerous to humans

Materials that can be pulled out, or drawn, into a long wire

On the Periodic Table of Elements, Groups 3-12, most are hard and shiny and good conductors

Spontaneous emission of radiation by an unstable atomic nucleus

Substances that conduct electricity under some conditions but not under other conditions

On the Periodic Table, characteristics of metals & nonmetals, staircase part of periodic table

A substance formed as a result of a chemical reaction

Horizontal rows on the periodic table

The positively charged center of an atom

The reaction of a metal with oxygen to form rust

The ease or speed at which an element combines with other elements and compounds

Positively charged particles in the nucleus of an atom.

The electrons that are in the highest energy level of an atom

A bond formed by attraction between opposite charges in an ionic compound; produces (+ ) & (-)

Vertical columns on the periodic table

Negatively charged particles in an atom

On the Periodic Table of Elements, Group 2, react by losing two electrons

A material that can be hammered into sheets and other shapes

Describes an atom whose outer energy level is completely filled with electrons

Group 18, least reactive, atoms don't usually gain, lose, or share electrons (no compounds)