Observing God's World chapter 6

formed by zooming electrons around a nucleus

study of subtances and how they act

an object's _?_ changes from place to place

the number of protons of any element

the three main groups of elements are: semimetals, nonmetals and _?_

hardest known substance

a substance made of only one type of atom

all matter is composed of ?

metals are normally what state of matter?

the halogen in bleach and germ-killing items

a halogen which is added to drinking water and toothpaste

added to table salt to help people get this

computer chips are made of this metal

highly reactive elements, especially with alkali and alkaline metals

2 objects of same volume have different densities must have different _?_

the earth's surface most abundant element

proton's charge

The measure of the pull of gravity on an object

elements which do not combine with any other element; except under extreme circumstances

a rapid reaction because of oxygen

The amount of matter that makes up an object

electron's charge

electrons _?_ each other

colorless, odorless gas which is 78% of earth's atmosphere

the helpful element in stainless steel

The tiny, extremely dense core at the center of an atom

What type of scientists have we been in this chapter?

a substance of two or more elements bonded together

the basic building block element of all living compounds

the only metal liquid at room temperature

how much matter is in one unit of volume

Anything that takes up space and has mass

in order for an atom to be neutral the number of protons and electrons must be ?

The metric unit that is used to measure an object's mass

charged atoms becoming a compound

two or more atoms firmly bound together

lacking an electrical charge

process in which elements join and rearrange to form something new

The tiny particles that swarm at tremendous speeds around the core of an atom

an organized arrangement of all known elements

one proton and one electron element

The two particles that make up the nucleus of an atom

when an element turns from solid to gas without becoming a liquid first (iodine)

a compound made of molecules