Question
The NEUTRON was discovered (1) after the idea of the (2) was widely accepted by scientists. 1:20 years; 2: nucleus 1:20years;2:atom 1:20 months ; 2: atom 1:20 months: 2: nucleus
Answer
4.6
(193 Votes)
Xanthe
Veteran · Tutor for 9 years
Answer
The correct answer is: 1: 20 years; 2 : atom.
Explanation
## Step 1: The question is a fill in the blanks type. We need to find the correct pair of words that fit into the blanks. The sentence is about the discovery of the neutron and the time it took after the acceptance of a certain concept by scientists.## Step 2: The first blank is about the time it took for the neutron to be discovered. From the example, we know that neutrons were discovered in 1932, more than 10 years after the existence of isotopes was confirmed. So, the time should be in years, not months. This eliminates options 3 and 4.## Step 3: The second blank is about the concept that was widely accepted by scientists before the discovery of the neutron. From the example, we know that the concept of isotopes was confirmed before the discovery of neutrons. However, isotopes are variants of a particular chemical element which differ in neutron number, and are a subset of a particular element's atomic number, which is part of the concept of the atom. Therefore, the concept that was widely accepted by scientists before the discovery of the neutron is the atom. This eliminates option 1.