Exam 1 Study<3

Question 1

According to JJ Thompson’s experiment

Answer 1

Atoms are positive cloud of matter with electrons randomly scattered
Via plum pudding model

Question 2

Which of the following is NOT a part of Dalton’s theory regarding matter?

Answer 2

Compounds are a combination of two or more elements

His theory was that all atoms of the same element are identical

Question 3

Of the following, which has the most energy

Answer 3

Gamma Rays

Question 4

JJ Thompson is credited with discovering all of the following except

Answer 4

The charge of the electron

Millikan is responsible for this discovery

Question 5

In 1909, a scientist observed a fine mist of oil between two charged plates. Of the following which are related to this experiment?

Answer 5

R. Millikan, and Mass of electrons

Question 6

Which is true

Answer 6

Rutherford observed alpha particles bounce back which meant that atoms had a positive, dense nucleus.

Question 7

A____is a positively charged ion, while a(n)____is a negative charged ion.

Answer 7

A cation is a positively charged ion, while a(n) anion is negatively charged ion.

Question 8

A substance particle is____.The three subatomic particles in atoms are _____.
_______and______. Their discovery disproved_____idea that_______.

Answer 8

A substance is a particle that is smaller than an atom. The three subatomic particles in atoms are neutrons, protons, and electrons. Their discovery disproved Dalton’s idea that atoms are indivisible and identical for the same element.

Question 9

Isotopes

Answer 9

Same number of protons, different number of neutrons, differ in atomic mass but not in chemical properties. With Isotopes Atomic mass number is on top and atomic number is on bottom.