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