Ch 19 Mouse Mischief

Physical Science

Elements and their Properties

At room temperature, most metals are ____.

gases

liquids

radioactive

solids

The process by which solid iodine particles change directly to gas without first becoming a liquid is called ____.

condensation

evaporation

ionization

sublimation

Elements that form salts by combining with metals are ____.

allotropes

fluorides

ionics

halogens

Substances that conduct an electric current only under certain conditions are most likely to be ____.

metals

metalloids

noble gases

nonmetals

Different forms of the same element that have different properties because of different atom arrangements are called ____.

allotropes

carbons

graphites

halogens

An allotrope of carbon that is soft and can be used as a lubricant is ____.

diamond

graphite

sand

silicon

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

diamond

graphite

quartz

silicon

Hydrogen is grouped with the alkali metals because it ____.

does not readily form compounds

has one electron in its outer energy level

is a gas

is a metal

A chemical family whose members exist as reactive diatomic molecules in the gaseous phase is the ____.

actinide series

alkali metals

halogens

lanthanide series

A chemical family whose members exist as reactive diatomic molecules in the gaseous phase is the ____.

actinide series

alkali metals

halogens

lanthanide series

When hydrogen reacts with the active metals, it forms a chemical bond by ____.

gaining one electron

losing one electrons

losing two electrons

sharing electrons

The elements in Groups 3 through 12 of the periodic table are the ____.

actinides

alkaline earth metals

transition elements

halogens

A family of elements that has two electrons in its outer energy level is the ____.

actinides

alkaline earth metals

alkali metals

halogens

Metals can be used as wire because they are ____.

alloys

ductile

metallic

shiny

Elements in which the outer electrons are NOT held tightly are most likely to form ____ bonds.

covalent

hydrogen

metallic

radioactive

Bromine is the only halogen and nonmetal that is normally a ____.

gas

liquid

semiconductor

solid

The only metal that is a liquid at room temperature is ____.

copper

mercury

silver

sodium

A synthetic element that is used in smoke detectors is ____.

aluminum

americium

sodium

technetium

All synthetic elements are ____.

liquids

needed by human body

radioactive

useful in making plastics

Cobalt, iron, and nickel are known as the ____ triad.

nickel

cobalt

iron

steel

Three transition elements in Group 12 of the periodic table are ____.

copper, silver, and gold

iron, nickel, and cobalt

mercury, zinc, and cadmium

neon, helium, and xenon

Any element with an atomic number greater than that of uranium is a(n) ____.

halogen

lanthanide

transition element

transuranium element

The noble gases are in ____.

Group 18

Group 1

Group 13

Group 2

Elements that lie along the stair-step line of the periodic table are ____.

liquids

metals

metalloids

radioactive

The appearance of solid metals can be described as ____.

dull

glassy

powdery

shiny

A family of elements that contains the most reactive metals is the ____.

noble gases

alkaline earth metals

alkali metals

transition elements

Radioactive elements comprise a majority of the ____.

actinides

halogens

lanthanides

noble gases