Show:
Organizing Elements
Modern Periodic Table
Representative Groups
Vocabulary
Miscellaneous
100
This scientist developed the periodic table.
Who is Mendeleev?
100
Horizontal rows on the periodic table are called _____________.
What are periods?
100
Name any element similar to a)Xenon (#54) and b)Bromine (#35)
What is a) Xenon- any element in Group 8A b) Bromine - any element in Group 7A?
100
Atoms of the same elements with different numbers of neutrons are called this.
What is an isotope?
100
Metals can be described as good conductors of these.
What are heat and electricity?
200
Mendeleev's periodic table was organized by increasing __________________.
What is atomic mass?
200
The vertical columns on the periodic table are called ____________.
What are groups?
200
The name given to the group of elements that are the most stable. (Group 8A)
What is Noble Gas?
200
This group contains the most reactive metals.
What is alkali metals?
200
Metalloids have characteristics of both of these.
What are metals and nonmetals?
300
Mendeleev left a gap for undiscovered elements. He called one element __________________, which was later discovered and named gallium.
What is eka-aluminum?
300
Most of the elements on the left side of the periodic table are classified as this.
What are metals?
300
The elements in this group are the least reactive on the periodic table.
What are the Noble Gases?
300
The pattern of repeating properties from row to row.
What is periodic law?
300
As you look across a period, the number of valence electrons _________________.
What is increases?
400
Describe the usefulness of Mendeleev's periodic table.
What is it could accurately predict properties of undiscovered elements?
400
This is how the modern periodic table is organized.
What is by increasing atomic number?
400
These are the most reactive groups on the periodic table.
What are Groups 1A and 7A (Alkali Metals and Halogens)?
400
Elements with the same number of valence electrons will be found in a _______________.
What is a group?
400
This element is used as a standard to determine an atomic mass unit.
What is Carbon-12?
500
An arrangement of elements in columns, based on a set of properties that repeat from row to row.
What is the periodic table?
500
This element is in Group 7, Period 3. Determine the element name, atomic number, and atomic mass.
What is chlorine? Atomic number - 17, Atomic Mass - 35.45
500
Elements in the Oxygen Family have this number of valence electrons.
What is 6 valence electrons?
500
The weighted average of an element's isotope.
What is atomic mass?
500
Phosphorus has ______________ valence electrons.
What is 5?