Question

question 4 (1 point)
(02.01 lc)
match the scientist to his contribution to the atomic theory

column a column b
1 ___ thomson a nucleus
2 ___ rutherford b electron energy levels
3 ___ bohr c electrons

question 5 (3 points)
(02.01 lc)
isotopes of the same element have different numbers of ______
○ a neutrons
○ b protons
○ c neutrons and electrons
○ d protons and electrons

question 6 (1 point)
(02.01 lc)
what is true of protons?
○ a they are positively charged and located inside the nucleus.
○ b they are positively charged and located outside the nucleus.
○ c they are negatively charged and located inside the nucleus.
○ d they are negatively charged and located outside the nucleus.

Explanation:

Question 4

1. J.J. Thomson discovered electrons, so Thomson matches with c (Electrons).
2. Ernest Rutherford discovered the nucleus, so Rutherford matches with a (Nucleus).
3. Niels Bohr proposed the model with electron energy levels, so Bohr matches with b (Electron energy levels).

Isotopes are atoms of the same element with the same number of protons (which defines the element) but different numbers of neutrons. Protons and electrons are equal in neutral atoms, and electrons don't define isotopes. So isotopes differ in neutrons.

Protons are positively charged particles located inside the nucleus of an atom. Electrons are negative and outside, neutrons are neutral inside. So option a is correct.

Answer:

1. Thomson - c. Electrons
2. Rutherford - a. Nucleus
3. Bohr - b. Electron energy levels

Question 5