Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/45

Click to flip

45 Cards in this Set

  • Front
  • Back
What Greek philosopher Coined the term atoms?
Democritus
What are the 3 parts of John Dalton's atomic theory?
1. EVERYTHING is made of atoms
2. Atoms of the SAME element are ALIKE
3. Atoms of DIFFERENT elements form Molecules
Whose atomic theory stated electrons move in orbits called energy levels?
Niels Bohrs
What are atoms made of?
Nucleus - center
protons + (positive) and Neutrons (no charge)
electrons orbit the atom - (negative)
What atomic theory states that it is impossible to determine the exact position of an electron?
The Modern Theory of the Atom
Where are electrons found?
in Orbitals
How many electrons can each orbital hold?
2
What are the sublevels that energy levels can be broken up into?
s
p
d
f
What are the electrons in the outermost energy level?
Valence Electrons
What does the Periodic Law state?
properties of elements change in a pattern when they are arranged in increasing atomic number
What are Horizontal Rows called?
periods
What are Vertical Columns Called?
groups
What happens when an atom gains or loses electrons?
ionization
What are positively charged ions called?
cations
What are negatively charged ions called?
anions
Why do atoms lose or gain electrons?
So that they can have 8 valence electrons in their outer energy level
What does the Atomic Number tell you?
The number of protons an atom has.
True or False

The atomic number is unique for every atom.
TRUE
Where can the mass number be written?
after the name of an element
What do we call any atoms having the SAME number of protons but DIFFERENT number of neutrons?
Isotopes
True or False?

Average atomic mass for an element is the average for all isotopes.
TRUE
What is the most reactive metal?
Francium
What is the most reactive Nonmetal?
Fluorine
Where do you find Semiconductors?
between metals and nonmetalss
What can be found in Group 17?
elements called halogens
What can be found in Group 18?
elements called the Noble gases
Who came up with the Atomic Theory?
John Dalton
How many electrons can an orbital hold?
2
What atomic theory says that elctrons move in ORBITALS?
MODERN THEORY OF THE ATOM
The atomic number is the number of what?
Protons
The mass number is the number of what?
protons & neutrons
What family have 8 valence electrons & are the "snobs" of the periodic table?
Noble Gases
Oxygen & Ozone are different forms of the same element so are diamonds and carbon and know as what?
Allotropes
Why do alkaline metals get more reactive as they go down the Periodic Table?
Valence electrons are further out so they are easier to take away.
What is the code used for Quantum numbers?
s p d f
0 1 2 3
How many numbers do you use in finding Quantum numbers?
4
What do the Quantum numbers tell you?
The location of an electron
What does the first Quantum number tell you?
The energy level
What does the second number tell you?
the sub-level
What does the third number tell you?
The orbital
What does the 4th number tell you?
Which electron
What happens to alkaline earth metals as you move down the table?
They get more reative
What charge do protons have?
positive
What charge do neutrons have?
no charge
What charge do electrons have?
negative