Per A Mid Term

Question 0

Isotope

Answer 0

And Adam of an element that has a different number of neutrons

Question 1

Compound

Answer 1

Two or more elements bound together smallest unit of an Atom

Question 2

Periodicity

Answer 2

Ability to determine element on the table

Question 3

Tridium

Answer 3

One proton one element two neutrons

Question 4

Element

Answer 4

Purest of matter can’t be broken down smallest unit is an Atom

Question 5

Pure substance

Answer 5

Same 12 all elements are pure substances (gold iron silver bronze platinum)

Question 6

Mixture

Answer 6

Two or more substances

Physically combined physically separated no definite amount

Question 7

Aristotle

Answer 7

Determine the four elements

Question 8

Democratus

Answer 8

There is a void between Atoms

Question 9

Thomson

Answer 9

Ray tube and raison bun model

Question 10

Ruth

Answer 10

Nuclear model and gold foil experiment

Question 11

Bohr

Answer 11

Quantum theory and explains neutrons

Question 12

Chadwick

Answer 12

Three parts to Adam negative neutron positive

Question 13

Octet rule

Answer 13

Last 2S and P orbitals equal eight