WorksheetsEL4 P.T. Self Check
Total questions: 22
Worksheet time: 11mins
Who is credited with devising the basics of the modern periodic table?
Dmitri Mendeleev
Daniel Stier
Albert Einstein
Carl Yastrzemski
At its most basic level, the periodic table organizes elements by their __________.
atomic number
atomic mass
color
alphabetical order
The atomic number is equal to the number of ________ of an atom.
protons
neutrons
atomic nuclei
friends
The majority of the elements in the universe are _______.
metals
nonmetals
metalloids
happy
The elements shown in blue are ________.
nonmetals
metals
metalloids
The elements shown in red are ________.
nonmetals
metals
metalloids
The elements shown in yellow are ________.
nonmetals
metals
metalloids
The horizontal rows in the periodic table are called ________.
periods
groups
columns
exclamation points
The vertical columns in the periodic table are called ________.
periods
groups
rows
exclamation points
Sodium (Na) is in group ____.
1
2
3
4
Chlorine (Cl) is in group ____.
7 or 17
2
3
6 or 16
Potassium (K) is in period ____.
4
2
3
5
Aluminum (Al) is in period ____.
4
2
3
5
What element is in period 4, group 8 (18).
Krypton
Helium
Hydrogen
Silicon
What element is in period 2, group 2.
Beryllium
Hydrogen
Carbon
Phosphorus
What does the period number tell about the structure of an atom?
The number of electron shells
The number of outside shell electrons
Its current mood
Its atomic mass
How many electron shells do each of these elements have?
2
4
6
8
What period does this element belong in?
3
1
2
4
What does the group number tell about the structure of an atom?
The number of electron shells
The number of outside shell electrons
Its current mood
Its atomic mass
Outside shell electrons are called ________ electrons.
valence
negative
positive
passive
How many valence electrons does lithium have?
1
2
3
4
What group would the following atom belong in?
4 or 14
3 or 13
2
1
