Atomic Structure/Periodic Table
Representative groups
Organizing the elements
Modern Periodic Table
Periodic table groups
100
Where are electrons located on an atom?
Electron shell
100
Elements in this group all have one valence electron and are highly reactive metals.
Alkali Metals
100
This Russian chemist published one of the first periodic tables:
Dmitri Mendeleev
100
Each row on a periodic table is called a ____________.
Period
100
Elements in a group on the periodic table have the same number of ___________ ____________.
valence electrons
200
How do you find the amount of neutrons in an atom by looking at the periodic table?
Subtract the atomic number from the atomic mass
200
These metals are the second most reactive group and include Mg (Magnesium). They have two valence electrons
Alkaline Earth Metals
200
How was Mendeleev's periodic table different than the modern periodic table?
less elements and it was in rows of increasing mass
200
Each column on the periodic table is called a __________.
Group
200
Sodium is found in which group on the periodic table?
Alkali Metals
300
What are the names of the elements in groups 3-12?
Transition metals
300
These gases are inert (they don't react with other elements).
The Nobel Gases
300
True or false: Mendeleev predicted the chemical properties of elements that weren't even discovered yet.
True
300
Elements on the periodic table are arranged in order of increasing __________ ____________.
atomic number
300
Give two properties of metals:
good conductors of electricity and heat most are solid at room temperature ductile malleable shiny
400
What is the name of group two on the periodic table?
Alkaline metals
400

This group is numbered 3-12. What is the name of the group?

Transition metals

400
True or false: Mendeleev was the first person to arrange elements in a periodic table.
False.
400
The mass of an atom is described in units of _______ ______ _________.
atomic mass units (amu) **Which is approximately one twelfth the mass of a carbon-12 atom.**
400
Elements of this group are highly reactive with metals, they include chlorine and bromine.
Halogens
500
What are the names of the two separate periods from the periodic table?
Lanthanoids and actinoids
500
Name two elements essential to life: known as a major element.
Hydrogen (H) Calcium (Ca) Carbon (C) Nitrogen (N) Oxygen (O) Phosphorus (P)
500
Why is Mendeleev credited with one of the first periodic tables- why is he so famous for it?
He was able to offer the best explanation for how the properties of an element were related to its location in his table.
500

The horizontal row on the periodic table?

period

500
Which group on the periodic table do all elements strive to be like?
The noble gases
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