Science Ch. 6 Test Review

The simplest kind of atom with one proton and one electron

The semimetal that is used to make computer chips is called _____________.

The number of protons an atom has

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

A process in which atoms of elements or compounds are rearranged to form new substances

Most metals are __________________.

THe colorless, odorless gas that makes up 78% of the earth's atmosphere is __________________.

The tiny particles of which all matter is composed

The halogen that is useful as a bleach and a germ-killing agent is _________________.

The proton has a negative charge.

Formed by electrons that are in orbit the same distance from the nucleus

Two electrons attact each other.

Anything that takes up space and has mass

The only metal that is liquid at room temperature is ______________.

The most abundant element at the surface of the earth

The amount of matter in one unit of volume

The halogen that is added to table salt to prevent a deficiency disease is ________________.

Lacking an electrical charge

A mixture is a substance composed of one or more types of atoms bonded together.

A compound made of molecules

Iodine, when heated, does not melt but instead sublimes, or turns to gas.

The amount of matter that makes up an object

Highly reactive elements that tend to form compounds with alkali and alkaline earth metals

An element is a substance that is composed of only one type of atom.

The densest of the everyday metals is _______________.

If two objects have the same volume but the different densities, the object made of the denser substance weighs less.

The element that is the basic building block of all the compouns is_______________.

The rapid reaction of any substance with oxygen.

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

Formed by electrons zooming around the nucleus of an atom

The weight of an object changes from place to place.

The hardest of all known substances

The halogen that is added to toothpaste and drinking water is ________________.

The organized arrangement of all known elements

A very hard metal which is an important ingredient in stainless steel is ______________.

The three main groups of elements are metals, nonmetals, and semimetals.

A compound made of charged atoms

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

The study of what substances are made of and how one substance can be changed into another

The measure of the pull of gravity on an object

Two or more atoms firmly bound together form a neutron

A neutral atom has an equal number of protons and electrons.