Standard
Matter 9.1 – Recognize that all matter consists of atoms.
Student friendly language – Everything in the universe is made up of little things called atoms.
Parts of an atom:
The atom consists of protons, neutrons, and electrons.
 Protons o o o
Located in the nucleus
Charge of +1 (positive
1)
Mass of 1 (atomic mass unit)
 Neutrons o Located in the nucleus o Charge of 0 o Mass of 1 (atomic mass
 Electrons o Located orbiting around nucleus o Charge of -1 (negative unit) 1) o Mass of 0
The smallest part of an element that retains the properties of the element is the atom. Atoms have specific numbers of protons. The number of protons an atom has determines the element that the atom is. For example, if an atom has 6 protons, the atom is Carbon. If the atom has 4 protons, the element is
Beryllium. If the atom contains 79 protons, the element is Gold.
Sometimes these questions will give you a list of substances and you will need to come to a conclusion about how they are similar. Most of the time the answer will be atoms. In order to best increase your success of understanding the questions, you should also be familiar with the different elements. If you can identify certain substances as elements or not elements then you will be more successful.
MOST LIKELY IF A QUESTION IS ABOUT THIS STANDARD THE ANSWER WILL BE ATOMS
1.
The smallest unit of matter that contains all of the properties of a specific element is called a.
A molecule. b.
A compound.
2.
The structure represents ethanol c.
A mixture. d.
An atom.
What is the circled part of the diagram? a.
b.
An atom
A molecule c.
An ion d.
A proton
3.
A teacher gives a student an unidentified liquid in a beaker. Which statement can the student correctly make about the liquid without knowing any of its specific properties? a.
It is made up of atoms b.
It is a compound c.
It is a good electrical conductor d.
It is a nonmetal
4.
The aquarium contains a fish, gravel, water, and a plant. Which of these describes all matter inside of the aquarium? a.
All matter is in a liquid state b.
All matter is in a solid state c.
All matter is made up of atoms d.
All matter is made of cells
5.
What are the 3 subatomic particles? a.
Protons, Nucleotides, Energy b.
Phosphorus, Neutrons, Electrons
6.
What is the charge of the Proton? a.
+1 b.
-1 c.
d.
c.
d.
Protons, Neutrons, Electrons
Particles, Nucleotides, Electrons
0
+2

7.
What is the charge of the Electron? a.
+1 b.
-1
8.
Which statement about the mass of an atom is correct? c.
d.
0
+2 a.
The mass of an atom is equal to the number of protons and electrons. b.
All atoms have a mass of 0 because the mass of protons is +1 and the mass of en electron is
-1. c.
The mass of an atom consists of the number of protons plus the number of neutrons d.
The mass of an atom consists of the number of protons plus the number of electrons, plus the number of neutrons.
9.
An atom of Uranium has 92 protons and is unstable, meaning that Uranium will lose protons until it is stable. The atom becomes stable when it has 82 protons. What can be said about atoms that have different numbers of protons? a.
A physical change has occurred b.
The mass will be the same c.
The atom will be the same element d.
The atoms are different elements
10.
The nucleus of an atom consists of a.
Protons and Neutrons b.
Electrons and Protons c.
Protons, Neutrons, and Electrons d.
Neutrons and Electrons
11.
A scientist has 4 beakers on a table in front of him. One beaker has water, one beaker has sand, one beaker has oxygen, and one beaker has aluminum. Which of the following is not true about the contents of the 4 beakers. a.
They are made up of atoms b.
They are all made up of protons, neutrons, and electrons c.
They are all metals d.
All of the atoms have a nucleus
12.
All matter is made up of a.
Electricity b.
Atoms c.
Molecules d.
Water
13.
What is an atom a.
A tiny piece of matter that cannot be divided into smaller pieces b.
A molecule made up of only one kind of matter c.
A positively charged particle d.
Matter consisting of alpha and beta particles
In 2-4 complete sentences, briefly describe what you need to know about atoms.
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Answers: 9.1
1.
d
2.
a
3.
a
4.
c
5.
c
6.
a
7.
b
8.
c
9.
d
10.
a
11.
c
12.
b
13.
a
Short answer
 All matter is made up of atoms.
 Atoms are composed of protons, neutrons, and electrons.
 The number of protons determines the element of the atom.
 Atoms cannot be divided into smaller pieces.