Chapter 17- Atoms and the Periodic Table Flashcards
Atomic Number
number of protons in an element
Mass Number
total number of protons and neutrons
What is the charge of an atom?
The charge of an atom is neutral
What is the charge of the nucleus in the atom?
The charge of the nucleus is positive
What is the difference between the Electron Cloud Model and the Bohr Model?
The electron cloud atom gives the electrons somewhere to go
Vertical Columns
Groups/Famililes
Horizontal Rows
Periods
Who developed the periodic table?
Mendeleev
Isotope
an element with a different number of neutrons
What is Chlorine- 37?
an element with a mass of 37
Dot Diagram
how many electrons are in outer energy levels
metal
good conductor, hard
nonmetal
not a good conductor, soft
halogens
group 17 , 7 electrons in outer level, reactive
Noble Gases
group 18, unreactive, complete outer energy level
