periodic table Flashcards
What is the atomic number of Fe?
26
Elements that appear dull and are liquid at room temperature are called
non-metals
What element is Cu?
copper
Dmitri Mendeleev first organized the Periodic Table by increasing
atomic mass
Another name for each column in the Periodic Table?
group or family
Electrons have a __________ charge.
negative
What group contains the most reactive metals?
group 1
he Periodic Table is divided into metals, non-metals, and…..
metalloids
Who first hypothesized the idea of an atom around 440 BC?
Democritus
Shiny, solid elements are typically ____________.
metals
What is the element symbol of Sodium?
na
What is the element name of Fe?
iron
Group 18 is also known as the ________________
noble gases
The modern Periodic Table is organized by increasing ________ .
atomic number
The atomic number represents the number of what?
protons