Structure
Models
Definitions
Periodic Table
Misc
100
The center of mass of an atom is called the
What is nucleus
100
Who developed the atomic theory?
Who is Dalton
100
Elements found in the last column of the periodic chart and are not reactive
What are noble gases
100
Which subatomic particle number does not change for a given element
What is proton
100
If an atom is neutral, then the number of electrons is equal to the number of
What are protons
200
Positively charged particles in the nucleus of an atom are called
What are protons
200
who discovered the electron?
Who is Thompson
200
What is the positively charged center of the atom
What is a nucleus
200
Which number on the periodic table is always largest?
What is atomic mass
200
How many electrons can the outer most shell of an atom hold?
What is 8
300
Negatively charged particles outside the nucleus are called
What are electrons
300
The model that proposed that the atom was a positively charged substance with negative charges dispersed randomly throughout is called
What is The Plum Pudding Model
300
Atoms with the same element with different numbers of neutrons are called
What is an isotope
300
To determine the number of neutrons, you subtract the
What is the atomic number from the atomic mass
300
Which Scientist designed an atomic model with protons and neutrons in the nucleus and electrons orbiting the nucleus in well defined paths
Who is Bohr
400
Sub atomic particles with no charge are called
What are neutrons
400
Rutherford is credited for discovering
What is the nucleus
400
the outermost shell of an atom is called the
What is valence shell
400
Does the reactivity of elements increase or decrease as you move from left to right across the periodic table
What is decrease
400
How many neutrons does Phosphorus have?
What is 16
500
Where are electrons found exactly
What is an electron cloud
500
The model that describes an atom as mostly empty space with protons and neutrons in the nucleus surrounded by electrons in an electron cloud is called
What is wave mechanical model
500
the number that ID's the element on the periodic chart and is also the number of proptons is called
What is the atomic number
500
If the atomic number of an element is 8, then how many protons does it have?
What is 8
500
How do you determine the atomic mas of an element with several isotopes? Write answer on board.
What is mass of each isoptope multiplied by natural abundance in decimal form. Then add each
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