Ch 3 Elements and the Periodic Table

Mendeleev left _____ empty spaces in his first periodic table.

There are ______ periods in the Periodic Table.

Argon is only found in its pure form in nature because it is a noble gas.

Chemical symbols must have all letters capitalized.

Family 16 makes compounds easily with Family ____

An element contains 74 protons and electrons and 108 neutrons. What element is it?

Nuclei include protons and electrons

Of the following, the one that contains the most reactive elements is the

Could a new element be placed between fluorine and chlorine?

The particles that move around the nucleus are electrons.

Malleable metals can be hammered into sheets.

A metalloid is another name for a transition metal.

Protons have a _________ charge

Elements in the same family have similar properties because

The alkali metals include iron, copper, silver and gold.

Noble gases usually exist as compounds.

Ductile metals can be hammered into shapes.

How many families are in the Periodic Table?

An alloy is a mixture of metals.

The atomic number of an atom is determined by

The mass of one proton is one AMU (atomic mass unit)

They are found on the shell/orbit furthest from the nucleus - _________

Unlike metals, many nonmetals are

The particles involved in transferring or sharing between atoms are valence electrons.

Mendeleev is credited with developing the first periodic table.

H2O is an example of a diatomic molecule.