The Periodic Table
Elements by Their Group
Periodic Trends
Definitions
All Sections
100
Who created the first list of elements?
Antoine Lavoisier
100
The element with an atomic number of 1, is in what type of group?
The Hydrogen Group
100
Which element has the largest atomic radius?
Francium
100
What is atomic radius?
The distance from the center of an atoms nucleus to its outermost electron.
100
In period 4, which element has the largest atomic radius?
K, Potassium
200
What did Dmitri Mendeleev do?
The First Periodic Table
200
Group 1 is considered ______and has ____ valence electron(s)
Alkali Metals, 1
200
Which group is chemically unreactive and what is the name of that group?
Group 18, noble gases
200
What is ionization energy?
The amount of energy required to remove an electron
200
Which groups are considered very chemically reactive?
Group 1, group2, group 17
300
Who created the modern periodic table?
Henry Moseley
300
What group is considered the Boron group and how many valence electrons does this group have?
Group 13, 3 valence electrons
300
What is the trend for electron affinity?
increases from bottom to top and left to right
300
What is the difference between electron affinity and electronegativity?
Electron affinity measure the energy required to add an electron, while electronegativity measures how well an element attracts electrons
300
What is the trend for ionization energy?
Increasing from left to right
400
Correct these sentences:
Rubidium is in Group 1, Series 1
Rubidium is in Family 2, Row 3
Rubidium is in period 3, column 3
Rubidium is in Group 1, Period 5
Rubidium is in Family 1, Row 5
Rubidium is in Period 5, Column 1
400
What element is considered the basis for life and what group is it in?
Carbon and Group 14
400
Which element is the most electronegative and what group is it in?
Fluorine, 17
400
What is the difference between electron affinity and ionization energy?
Electron affinity measure the energy required to add an electron, while ionization energy measures the energy it takes to remove an electron
400
Who developed a technique for counting the protons in an atoms nucleus?
Henry Moseley
500
What information does this element tell you?
Name: Calcium
Symbol: Ca
Atomic Number: 20
Atomic Mass: 40.08
500
What groups are considered the chalcogens and halogens, how many valence electrons does each group have?
group 16, 17. Valence electrons:6 and 7
500
How does the trend of atomic radius differ from electronegativity? Why?
They go in opposite directions.
The smaller radius allows the protons and electrons to attract strongly, which makes it more electronegative.
500
What is the definition of first ionization energy?
the minimum energy required to remove the first electron from its outermost shell.
500
Who organized the elements by atomic mass?
John Newlands