How to Identify things on
a periodic table
Atomic Number
the # of protons in
the atom's nucleus
Chemical Symbol
Element Name
the # of protons and
neutrons in the
atom's nucleus
Atomic Mass
How to Read the Periodic Table:
-Broken into 18 groups & 7 periods.
*REMEMBER: groups- vertical periods- horizontal
-Groups are related by chemical and physical
properties, whereas periods are not.
What are these groups known as?
Group 1- Alkali Metals
Group 2- Alkaline Metals
Groups 3-12: Transition Metals
Group 17- Halogens
Group 18- Noble Gases
Key Terms from Chapter 1:
Let's Try a Few Together! :)
1. What types of charges do protons, neutrons, and electrons
have?
PROTONS- Positive
NEUTRONS- Neutral (no charge)
ELECTRONS- Negative
2. Where can these particles be found?
PROTONS- Inside the nucleus
NEUTRONS- Inside the nucleus
ELECTRONS- Orbit outside the nucleus
Key Terms from Chapter 1:
Let's Try a Few Together! :)
3. Who was the British scientist that created the idea of the atom?
John Dalton
4. Who was the Russian scientist that came up with the idea of the
periodic table and how to arrange it?
Dmitri Mendeleev
5. How is the periodic table organized?
It is organized by atomic number and also by certain properties of
the elements.
Key Terms from Chapter 1:
Let's Try a Few Together! :)
6. What are some characteristics of metals?
Most are shiny, easily shaped, and are good conductors of heat
and electricity.
7. What are some characteristics of non-metals?
Opposite to metals--NOT good conductors of electricity or heat.
*Most have the ability to gain electrons easily*
8. What are some characteristics of metalloids?
Contain qualities of both metals and non-metals.
Silicon, for example, possesses a metallic luster, yet it is an inefficient conductor
and is brittle.
Key Terms from Chapter 1:
Let's Try a Few Together! :)
9. How can positive ion form?
When an atom LOSES one or more electrons.
10. How can a negative ion form?
When an atom GAINS one or more electrons.
11. What is an isotope?
When the atoms of the same element have a different
number of neutrons.
Find your key! This will help you determine the element's details. :)
NOTE: not every periodic table is the same! Make sure you identify the key.
TOMORROW YOU WILL NOT BE GIVEN THE GROUPS/PERIODS ARROWS!
What group/period is Zinc found in?
Group 12; Period 4
What element has 56 protons?
Barium
Please tell me the chemical symbol of the element
that has 81 protons.
Tl- Thallium
Find the element at Group 12, Period 6. What is its
state of matter at room temperature?
Liquid
Tell me the group and period...
I am found in the Halogen group and am a liquid at room
temperature .
Group 17, Period 4 (Bromine)
What is the atomic mass of the element found at
Group 2, Period 2?
9.012
Find the element at Group 5, Period 7 and
determine the # of neutrons in the atom's nucleus
157 Neutrons
Atomic mass - Atomic Number
262 - 105
In an average atom of Chromium, there are 24
protons. How many electrons would there be?
24 Electrons
How to Read the Periodic Table by Group/
Period (Open Textbooks to p. 20):
Let's Try a Few Together! :)
1. Find the element at group 14, period 2. What is the atomic number of
this element? Carbon- 6
2. Find the element at group 17, period 5. What is the chemical symbol
of this element? Iodine- I
3. Find Lithium on the periodic table. What state of matter is it at room
temperature? Solid
4. Find the element in Group 3 Period 7. Is it a metal, non metal, or
metalloid? Metal
5. Find the element at group 8, period 4. What is its atomic mass?
Iron- 55.845