Periodic Table Basics
Elements on the periodic table are arranged in order of increasing this number.
Atomic number/protons
Does atomic mass increase or decrease as you go from left to right across the periodic table
Increase
What is the family name of the last group?
Noble gases
Period 3, Group 1
Sodium (Na)
The majority of elements are this:
Metals
Elements found in the same vertical column of the periodic table are called a ___.
Group/family
This periodic trend describes the size of an atom
Atomic radius
What is the name of the first group?
Alkali metals
Period 4, group 2
Calcium (Ca)
The stairstep on the periodic table represents these:
Metalloids
Elements found in the same horizontal row of the periodic table are called a _______
Period
Electronegativity increases as you get closer to this element
Fluorine
What is the family name of the metals in the middle of the periodic table?
Transition metals
Period 3, 5 valence electrons
Phosphorous (P)
Nonmetals
Elements in the same group generally have similar chemical properties because they have the same number of these types of electrons
Valence
Atomic radius increases as you get closer to this element
Francium
What group is the most reactive?
Alkali metals
Period 3, group 17
Chlorine (Cl)
What group has these characteristics: dull, poor conductors of electricity, not malleable, not ductile
Nonmetals
Name the two people who contributed to the organization of the periodic table (just last name is acceptable)
Mendeleev and Mosley
Name 3 periodic trends we discussed (five total)
Atomic mass, atomic radius, ionization, electronegativity, reactivity
What group is the most stable?
Noble gases
Period 3, 6 valence electrons
Sulfur (S)
Which groups has these characteristics: shiny, good conductors of electricity, malleable, ductile
Metals