Exam 11: The Chemical Elements

An atom or chemical combination of atoms with a net electric charge is called a(n)______________.

Calcium carbonate is the major component of each of the following except

The compound BeF₂ is named ______________.

How many shells in an atom of silicon contain electrons?

The symbol for copper is

An atom that has more electrons than protons is a ______________ ion.

Give the name for each element. Cl_____________ $\mathrm { Fe }$ __________ $\mathrm { Si }$ ___________ $\mathrm { Na }$ ____________

What scientist discovered more elements than any other person?

Hydrogen,nitrogen,and chlorine are among the elements that occur as molecules made up of ______________ atoms.

Hydrogen is generally classified as a

The Group 7A element astatine (₈₅At)would be predicted to occur in what phase?

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

Aluminum is an example of

In general,elements that have four to eight electrons in their valence shell are

A gold-plated (gold-covered)piece of jewelery,such as a bracelet,is

Homogeneous mixtures are those mixtures that have variable but ______________ composition.

The ______________ of a given solute is the amount of solute that will dissolve in a specified mass of solvent at a given temperature to produce a saturated solution.

The most reactive of all elements is

The most modern definition of element is