An elements properties can be predicted form its _______________________.

If a substance is ____________, it can be pulled or drawn into a wire.

Ductile

A _______________ is a positively charged particle in an atom’s nucleus.

proton

True or False•Metals are malleable, ductile, brittle and good conductors.

False

An element’s ________________ shows the number of protons in its nucleus.

Atomic number

Dmitri Mendelev created the first _____________________.

Periodic table

The particles that are involved in the transfer or sharing between atoms are ____________________.

Valence Electrons

A(n) _____________________ has some of the properties of both metals and nonmetals.

Metalloids

The family of _______________ is the most reactive group of metals in the periodic table.

Alkali metals

The ____________ and the ________________ are shown at the bottom of the periodic table in order to keep the table a reasonable size.

Lanthanides and Actinides

A mixture of metals is called a(n) __________________.

Alloy

True or False•Nonmetals are good conductors of heat and electricity.

False

True or False•From left to right on the periodic table, the elements are arranged in order of decreasing atomic mass.

False

The mass of a proton is about one atomic mass unit.

True

True or False•The reactivity of the metal elements generally increases as you move from left to right across the periodic table.

False

What are the pieces of information found in a square on the periodic table?

Atomic number – Chemical symbol – Name of element – Atomic mass -

Name my group?•I am a solid that is moderately reactive. I conduct heat and electricity well. Sometimes my metals have unusual colors. What family am I?

Transition metal

Name my group?•I am a solid that is highly reactive. I appear silver-white. I conduct heat and electricity well.

•What family am I?

Alkali Metals

The sun and many other stars are made mostly of the element __________________.

Hydrogen

True or False

Nitrogen nuclei and energy are the products of the nuclear fusion of the sun’s hydrogen.

False

Helium

When two identical nonmetal atoms are bonded together, the result is a(n) __________________________.

Diatomic molecule

I am a gas at room temperature. I have a greenish-yellow color. I am highly reactive and I have poor conductivity. What family do I belong?

The Halogen Family

I am colorless and at room temperature I am a gas. I do not conduct heat or electricity well. I do not react to other elements. What family do I belong?

The Noble Gas Family