Science 600 unit 5: CHEMICAL STRUCTURE AND CHANGE: Chemical Elements and Atoms

The electrons of an atom revolve around a(n)

Nucleus

The nucleus of an atom contains the ______.

Protons and Neutrons

compress

Squeeze together; make smaller by pressure.

element

A substance that is made from only one type of atoms.

The planetary model is also known as the ____ model

Bohr

The smallest building block of an element is:

An atom

Subatomic particles include all of the following except:

Atoms

The space surrounding the nucleus of an atom is where the _________ are located

Electrons

Atoms can be seen with a powerful microscope.

False

Each element can be broken down into simpler minerals.

False

Electrons travel at slow speeds.

False

swarm

Fly or move about in great numbers.

Who was Robert Boyle?

He was an Irish scientist who lived in England.

The simplified model and the electron cloud model both attempt to show and explain

The electrons moving around the Nucleus.

atom

The smallest unit of an element.

Each particular atom within the element "copper" has all the chemical properties of copper.

True

Substances that are made from just one type of atom are elements.

True

The Bohr model shows the electrons in orbit around the nucleus.

True

The electron cloud model shows the probability of where an electron is at any given moment.

True

The presence of atoms can be verified by _______ and chemical reactions

X-rays

What is true about an element?

an atom is the smallest part of an element