Exam 11: The Chemical Elements

"Buckyball" is an allotrope of the element

When the atoms of two or more elements react chemically,they usually join together to form

The elements that hardly ever react with other elements to form compounds are called the ______________.

The element ______________ displays some chemical properties of both Group 1A and Group 7A elements.

The symbol for oxygen is

The preferred name for N₂O (commonly called nitrous oxide)is

Living next to a lake near volcanic activity can be deadly.There can be large amounts of CO₂ dissolved in the water.An earthquake,landslide,or even rapid cooling can trigger the release of the CO₂,causing death nearby.The water of the lake in these cases is

The element ______________ was the gas used in the Hindenburg.

The symbol for carbon is

An atom that has equal amounts of protons and electrons is a ______________ ion.

Elements in Period 2 of the periodic table have electrons in how many shells?

All specimens of a pure ______________ have identical properties and composition.

About 85% by mass of Earth's core is composed of the element(s)

The chemical properties of calcium and strontium are similar because both

Take a cup of water,add sugar,and stir.If the resulting solution contains sugar crystals that do not dissolve,the solution is said to be

The vertical columns in the periodic table are called ______________.

A(n)______________ is a nonchemical combination of two or more substances in variable proportions.

The second shell of an atom can hold a maximum of ______________ electrons.

An element that is malleable,ductile,and a good conductor of heat and electricity would be classified as a

Which of the following Group 1A elements has the largest atom?