The average mass of all the isotopes of an element is called the

The highly reactive nonmetals in group 17 are called

The central core of an atom that contains the protons and neutrons

The # of protons in the nucleus of an atom

Mendeleev arranged his periodic table in order of increasing atomic number

Moving across the periodic table from left to right is most reactive to less reactive

Moving across the periodic table from left to right in order: metals, gases, non metals

another name for period is family

On the periodic table, elements in the same column have similar properties

Atoms of nonmetals usually lose electrons when they combine with other atoms

thermal conductivity is the ability of an element to transfer

the rows of the periodic table are called

Which is NOT a property of most nonmetals

The elements that have some properties of metals and some of nonmetals are called halogens

Substances that can carry electric current under some conditions but not under others are called semiconductors

Why aren't alkali metals used in construction?

From an element's location in the periodic table, you can predict

The atomic number of an element is based on the

Mendeleev created the first periodic table by arranging elements in order of

the columns of the periodic table are called

reactivity is ______ property of metals

One metal that is liquid at room temperature is

When two or more atoms bond by sharing electrons, they form a molecule

Which of the following is not a characteristic of most metals?

What do we know about metals?

at room temperature, most nonmetals are

The elements that do not usually form compounds are

if a material can easily be drawn into a wire, it is

The metals of Group 1 are called

The metals of Group 2 are called