Exam 11: Place and Time

Electrons in the outermost shell are referred to as ______________ electrons.

A sample of matter that contains atoms that all have the same number of protons is

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

Use the periodic table to find the atomic number, number of protons, number of electrons, and number of valence electrons for each of the following elements.a. barium b. tin c. phosphorus

Sodium is an example of

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

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

Which group is the nearest neighbor to the noble gases in the periodic table?

H₃PO₄ is the formula for _______________acid.

Matter can be defined as anything that ______________ ______________ and ______________ ______________.

The common name for NH₃ is ______________.

An element that tends to lose its valence electrons during chemical reactions is classified as a(n) ______________.

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

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

The electrons in the outermost shell are called ______________ electrons.

The vertical columns of elements in the periodic table are called

Elements in which the outer shell contains 8 electrons are known as the ______________.

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 horizontal rows of elements in the periodic table are called

Which of the following gases is monatomic?