Chapter 3: Elements and the Periodic Table

a very small particle that makes up most kinds of matter and consists of smaller parts called protons, neutrons, and electrons

• atom

• electron

• matter

• neutron

invisible, negatively charged particle located in a cloud like formation that surrounds the nucleus of an atom

• electron

• proton

• neutron

• nucleus

two or more atoms of the same element that have different numbers of neutrons in their nuclei

• atom

• compound

• isotope

• substance

states that matter is not created or destroyed but only changes form

• substance

• atomic number

• mass number

• law of conservation of matter

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

• mass number

• atomic number

• isotope

• atom

anything that takes up space and has mass

• atom

• substance

• matter

• element

element that is malleable, ductile, a good conductor of electricity, and generally has a shiny or metallic luster

• nonmetals

• element

• metal

• metalloid

element that has characteristics of both metals and nonmetals and is a solid at room temperature

• metals

• nonmetals

• element

• metalloid

an uncharged particle located in the nucleus of an atom

• electron

• neutron

• proton

• nucleus

elements that are usually gases or brittle solids and poor conductors of electricity and heat; are the basis of the chemicals life

• metals

• metalloids

• nonmetals

• element