Exam 11: The Chemical Elements

The ______________ for compounds are written by putting the composing elements' symbols adjacent to each other,with subscripts indicating the number of atoms of each.

Solutions are

The common name for CH₄ is ______________.

Diamond,graphite,and buckyballs are

Group ______________A elements have two valence electrons.

The common name for NH₃ is ______________.

Take a cup of water,add sugar,and stir.If the resulting solution no longer contains sugar crystals,the solution is said to be

______________ are substances that cannot be decomposed by chemical processes.

Only two elements,mercury and ______________,are liquid at room temperature and atmospheric pressure.

A substance composed of two or more elements chemically combined in a definite,fixed proportion by mass is

Which of the following Period 3 atoms has the smallest radius?

The elements of Group ______________ are the most chemically active metals.

The major division of chemistry that deals with what substances are present and in what quantities is called ______________chemistry.

Elements have similar chemical properties because they have the same number of electrons in their ______________.

The symbol for tin is

The horizontal rows of elements in the periodic table are called

Pencil "lead" (graphite)is made primarily of

The identity of an atom is determined by its number of

Two or more forms of the same element that have different bonding structures in the same physical phase are called

The vertical columns of elements in the periodic table are called