Vocabulary
Periodic Table
Elements
Structure of an Atom
Practice Problems
100
The number of protons in an atom's nucleus can be determined by looking at the ________ on the periodic table.
Atomic Number
100
The non-metals are located on this side of the periodic table?
Right side
100
What element has the symbol He?
Helium
100
What are the three subatomic particles?
Protons. Electrons. Neutrons.
100
How many electrons are in an oxygen atom?
8 electrons
200
Identify the charges of each of the subatomic particles.
protons +
neutrons 0
electrons -
200
Non-metals are usually _____ at room temperature.
A. solids
B. liquids
C. gases
Gases
200
Identify the atomic number of the following element. What else does this number represent?
29; number of protons
200
What two particles are found IN the nucleus.
Protons and Neutrons
200
What is the name of the element with a mass number of 32 and atomic number 16?
Sulfur
300
The what particles are found in the nucleus of an atom?
protons and neutrons
300
List two elements that are non-metals.
C, O, N, F, P, He, H, etc.
300
What is the mass number of this element? Identify the number of protons and neutrons in the element.
31; 15p; 16n
300
Where are the electrons located?
Electron Cloud
300
Name three metals.
Copper, gold, silver, nickel, titanium, etc
400
The rows of the periodic table are called ___________, and the columns of the periodic table are called _____.
Periods (rows)
Groups/Families (columns)
400
Name an element that is a metalloid. Then list one characteristic of metalloids.
Boron, Silicon, Antimony, Tellurium, Arsenic, Germanium
1. In between properties of metals/non metals
2. Semi-conductors
3. Solids at room temperature
400
Identify the number of protons, neutrons, and electrons in an atom of Be.
protons 4
neutrons 5
electrons 4
400
What atom is represented by the following Bohr diagram?
Fluorine
400
This element is located in Group 17 and Period 3
Chlorine
500
What determines the number of energy levels an atom has?
Period Number
500
List three properties of metals.
1. High melting points
2. Good conductors of heat and electricity
3. Shiny solids at room temperature
4. Malleable
5. Ductile
500
Identify the number of neutrons in the given element. What is the overall net charge of this atom?
zero net charge
neutrons 0
500
Draw the Bohr diagram of Magnesium.
500
How many electrons can fit into each energy level?
Energy level 1:
Energy level 2:
Energy level 3:
2
8
8