Physical Science Nine Week test 4

Used in semiconductors, computers

Atoms of the same element with different numbers of neutrons are called __

gives us white fireworks color

in toothpaste

found in match heads

Different forms of the same element that have different atom arrangements are __

coins and wires

Process by which iodine goes from solid to a gas

Hydrogen is grouped with the alkali metals because ___

An element's __ tells how many electrons the element must lose or gain to become stable.

The only metal that is liquid at room temperature

Group 18 contains the __

An atom is chemically stable when its outer energy level ____.

used in smoke detectors

A __ compound is formed from only 2 elements.

atomic theory

He first used the word "atom"; solid sphere atom

All synthetic elements are

the sum of the oxidation numbers in a neutral compound is always __

The appearance of solid metals can be described as __

red fireworks color

Element used in thermometers

in statues and bones

discovered neutrons

The oxidation number of an atom is shown with a __

CoCl₂ * H₂O is called a __.

The elements that make up a compound and the exact number of atoms of each element in a unit

Particles formed from covalent bonds

An allotrope of carbon that is hard and often used in jewelry

Disinfects water; bleach

The elements in groups 3 through 12 of the Periodic Table are the __.

At room temperature, most metals are __

used in diagnosing diseases

The sum of the number of protons and neutrons in an atom is the __.

used in photography; best conductor

What kind of chemical bond is formed from the equal exchange of electrons?

most used metal; steel

An element that loses an electron when bonding has a __.

The center of the atom

most abundant metal in earth's crust

found in paint pigments

He said electrons are in levels or orbits

Any element with a atomic number higher that uranium is a(n)

Metals that can be hammered into flat sheets are __.

The area around the nucleus occupied by electrons

light bulbs

The compound formed from the loss and gain of electrons is a __ compound

When an atom loses or gains an electron, the charged particle is called ___.

The __ is equal to the number of protons in an atom

used in fertilizer, ammonia

Bromine is the only halogen and nonmetal that is normally a ___

Helps prevent goiter

Elements that lie along the stair-step line of the Periodic Table

A particle that moves around the nucleus is a(n) __.

Metals can be used as wire because they are ___

How many electrons are needed in the outer energy level of most atoms for the atom to be stable

In formulas, the number of each type of atom in a compound is shown by __.

Chemical bond that occurs when atoms share electrons

A covalently bonded group of atoms that acts as one unit

Elements that form salts with metals are ___

blimps and balloons

in stainless steel

Laundry products

The allotrope of carbon that is soft and can be used as a lubricant

Particles of matter that make up protons and neutrons

stated the atom has a nucleus

A family of elements that has two electrons in its outer energy level