Elements, Atoms & Atomic Theory TEST

One or two letters used to represent an element on the periodic table is its _.

__ are the neutral particles located in the nucleus of an atom.

Each column on the periodic table in which elements have similar physical/chemical properties.

In the Bohr model of atoms, the second shell can hold __ electrons.

In the box, the word "sodium" is the _ of the element.

__ are the negatively charged particles found outside the nucleus of an atom.

In the Bohr model of atoms, the first shell can hold __ electrons.

A substance in which there is only one type of particle, such as oxygen, pure water or sugar.

An electron has a __ charge.

The average mass of an atom of a given element is its _.

A _ is shiny, a good conductor of heat and electricity, is malleable and ductile.

The letters "Na" in the box are the _ of this substance.

The term "subatomic" means LARGER than an atom.

The number "11" in the box is the _ of this element.

Each row of elements on the periodic table is called a _.

A neutron has a __ charge.

There are more metals than nometals on the periodic table.

The __ is a scientific theory that says that all matter is made up of atoms.

The most abundant element in the human body is _.

__ are the positively charged particles in the nucleus of an atom.

The green particles (with no sign on them) in the atom model are __.

A pure substance that cannot be separated into a simpler substance is a(n) _.

A _ is a semiconductor, meaning it has properties of both metals and nonmetals.

The red particles with "+" signs on them in the atom model are __.

__ are the smallest particles that elements can be and still maintain their properties.

The number of protons in an atom of any element is indicated by the _.

The yellow particles with "-" signs on them in the atom model are __.

In the box, the number "22.990" is the _ of this element.

A _ is dull, a poor conductor of heat & electricity, is brittle as a solid and is nonmalleable.

A proton has a __ charge.

A chart of elements arranged into rows & columns according to physical/chemical properties.