Question

1. write the name of the scientist beside the discovery or model name.

a. - this scientist’s model is called the planetary model
b. - this scientist discovered the proton
c. - this scientist’s model is called the plum pudding model.
d. -this scientist discovered the neutron.
e. - this scientist’s model is called the atomic model
f. - this scientist’s model is called the billiard ball model
g. -this scientist discovered the electron.
h. -this scientist theorized that most of the mass of an atom is found in a small area in the middle of it called the nucleus.
i. -this scientist theorized that each atom for each element looks different and each element has unique physical and chemical properties.

Explanation:

a. Niels Bohr proposed the Planetary Model where electrons orbit the nucleus like planets around the sun.
b. Ernest Rutherford is credited with the discovery of the proton.
c. J. J. Thomson's model of the atom was the Plum Pudding Model, where electrons were embedded in a positively - charged "pudding".
d. James Chadwick discovered the neutron.
e. John Dalton is associated with an early Atomic Model.
f. John Dalton also proposed the Billiard Ball Model, seeing atoms as solid, indivisible spheres.
g. J. J. Thomson discovered the electron.
h. Ernest Rutherford theorized that most of an atom's mass is in the nucleus.
i. John Dalton proposed that each element has unique atoms with distinct physical and chemical properties.

Answer:

a. Niels Bohr
b. Ernest Rutherford
c. J. J. Thomson
d. James Chadwick
e. John Dalton
f. John Dalton
g. J. J. Thomson
h. Ernest Rutherford
i. John Dalton