History of the Atom 2020

Question 1

Who first proved that atoms were divisible when he saw evidence of charged particles existing in the atom ?

Accepted Answer

Thomson

Question 2

With which of these statements would John Dalton have disagreed ?

Accepted Answer

Atoms can be divided into protons, neutrons, and electrons.

Question 3

Who used the spectral line of Hydrogen to determine that electrons have energy levels?

Accepted Answer

Bohr

Question 4

Who first determined that a compound always has the same relative numbers of types of atoms?

Accepted Answer

Dalton

Question 5

John Dalton thought that atoms are indivisible and cannot be destroyed

Accepted Answer

True

Question 6

Quantum mechanics is a branch of physics that deals with

Accepted Answer

matter and energy at atomic and subatomic levels

Question 7

The Bohr model suggests that electrons move?

Accepted Answer

only in distinct, spherical orbits at fixed distances from the nucleus

Question 8

Democritus suggested that matter?

Accepted Answer

existed in the form of very small, indivisible particles.

Question 9

The __________________ is 1836 times the mass of an electron. The slightly more massive ___________ is about 1838 times.

Accepted Answer

proton, neutron

Question 10

What is the currently accepted model of the atom?

Accepted Answer

the quantum-mechanical model

Question 11

Who discovered that atoms have a nucleus?

Accepted Answer

Rutherford

Question 12

The law of electrostatic charges states that?

Accepted Answer

both (red and blue)

Question 13

Rutherford's gold f oil experiment gave rise to which atomic model?

Accepted Answer

the nuclear model

Question 14

Who first discovered that electrons orbit the nucleus in shells?

Accepted Answer

Bohr

Question 15

Who, in 1897, discovered the electron?

Accepted Answer

Thomson

Questions 15