Atomic Structure
True or false, the number of neutrons in an atom has a large effect on its properties.
What is FALSE?
Developed the first atomic theory.
Who is John Dalton?
This subatomic particle determines an atom's properties.
What are electrons?
Columns on the Periodic Table refer to ____
What is Groups?
The number of electrons that an orbital can hold.
What is 2?
A subatomic particle with no charge
What is neutron?
This Greek Philosopher pondered the existence of atoms.
Who is Democritus?
The name, meaning indivisible, that was given to the smallest substance imaginable.
What is an Atom?
Rows are called _______
What is a period?
Atomic number: 4
Mass number: 9
Name the number of: protons, electrons & neutrons
Protrons: 4
Electrons: 4
Neutrons: 5
A subatomic particle with a positive charge
What is proton?
He rejected the ideas of Democritus.
Who is Aristotle?
True or False, The Law of Conservation of Mass states that matter can be created and destroyed.
What is false?
This element is required for life.
What is carbon?
The top number on each block in the periodic table represents this.
What is atomic number?
Subatomic particle with a negative charge
What is an electron?
He developed the idea that electrons orbit around the nucleus like planets.
Who is Niels Bohr?
This is an atom of an element with the same number of protons but different neutrons.
What is an isotope?
An element containing 7 valence electrons is called an alkali metal or a halogen.
What is halogen?
The bottom number on each block of an element on the periodic table refers to...
What is mass number or atomic mass?
JJ Thompson compared the atom to this.
What is plum pudding?
He placed elements across the rows by increasing mass.
Who is Mendeleev?
True or False: The Law of Constant Composition states that samples of a pure compound always have the same elements in the same mass proportion.
What is true?
The number of valence electrons found in group 1 elements.
What is 1?
This is the region of space around the nucleus where electrons are most likely to be found.
What is orbital?