Question
Which diagram shows a possible structure of a neutral atom?
Answer/Explanation
Ans:A
Question
The scattering of particles by a thin gold foil provided scientists with evidence for the nuclear atom.
Which particles were scattered by the gold nuclei in the thin foil?
A $\alpha$-particles
B $\beta$-particles
C neutrons
D protons
Answer/Explanation
Ans:A
Question
Three students are describing the structure of an atom.
student 1 All the positively charged particles are in the nucleus.
student 2 Positive electrons are in the nucleus.
student 3 Negative electrons orbit around the nucleus.
Which students are making a correct statement?
A 1, 2 and 3
B 1 and 2 only
C 1 and 3 only
D 2 and 3 only
Answer/Explanation
Ans: C
Question
When alpha particles are incident on a thin metal foil, most of them pass through undeviated.
What does this observation reveal about the nature of the atom?
A The atom has a dense nucleus.
B The atom is mostly empty space.
C The atom is very small.
D The nucleus of the atom is positively charged.
Answer/Explanation
Ans: B
Question
When alpha particles are incident on a thin metal foil, most of them pass through undeviated.
What does this observation reveal about the nature of the atom?
A The atom has a dense nucleus.
B The atom is mostly empty space.
C The atom is very small.
D The nucleus of the atom is positively charged.
Answer/Explanation
Ans: B