Vocabulary
The smallest unit of an element that still has it's properties is called _________
An atom
What are the positively charged particles of an atom?
Protons
This scientist was inspired by the Ancient Greek idea that atoms are uncuttable. He figured out that atoms of the same element are identical.
Dalton, Solid Sphere Model
The four states of matter are solid, liquid, _____, and plasma
gas
Which statement does NOT describe the current (Schrodinger's) model of an atom?
A) Atoms are mostly empty space
B) Electrons are found in a positive cloud
C) Electrons do not travel in a defined path
B) Electrons are found in a positive cloud
Periodic Table of Elements
What are the negatively charged particles of an atom?
Electrons
In 1897, Thomson discovered...________
Electrons and developed the Plum Pudding Model
What state of matter has a definite shape and volume?
Solid
Using your periodic table how many protons, neutrons, and electrons does Aluminum have?
Protons: 13
Electrons: 13
Neutrons: 13
The ____________ of an element determines its identity
amount of protons
Atomic number
What are the particles in an atom that are neutral and have no charge?
Neutrons
This scientist discovered that there are no set paths for electrons because it is impossible to know their exact location. This scientist developed the most widely accepted and most accurate model of the atom, which we still use today.
Schrodinger
What are the particles that can be found inside a nucleus?
Protons
Neutrons
Using your periodic table how many protons, neutrons, and electrons does Magnesium have?
Protons: 12
Electrons: 12
Neutrons: 12
A substance that is shiny, can be bent, and conducts heat and electricity is called ___________
A metal
What do elements share or transfer in order to form compounds?
Electrons
Neils Bohr developed the Planetary Model after discovering that electrons move around in the nucleus in...__________
orbits
What is used to put the periodic table in order?
Atomic Number
Using your periodic table how many protons, neutrons, and electrons does Chlorine have?
Protons: 17
Electrons: 17
Neutrons: 18 or 19
What is different in an isotope of an element?
The amount of neutrons
Name the 5 scientists we learned about who helped develop the atomic model in the correct order.
1) Dalton
2) Thomson
3) Rutherford
4) Bohr
5) Schrodinger
How do states of matter change form?
Adding or removing heat
Using your periodic table how many protons, neutrons, and electrons does Phosphorus have?
Protons: 15
Electrons: 15
Neutrons: 16