Understanding the Nucleus (2.1.3)

Question 1

• Radioactivity provided scientists in the early part of the twentieth century with a new tool for examining the interior of the atom.

Answer 1

• Radioactivity provided scientists in the early part of the twentieth century with a new tool for examining the interior of the atom.

Question 2

• Ernest Rutherford discovered the nucleus of the atom using a beam of α particles.

Answer 2

• Ernest Rutherford discovered the nucleus of the atom using a beam of α particles.

Question 3

• James Chadwick used a beam of α particles to indirectly detect neutrons.

Answer 3

• James Chadwick used a beam of α particles to indirectly detect neutrons.

Question 4

• Since atoms were found to be divisible, Dalton’s atomic theory of matter had to be revised.

Answer 4

• Since atoms were found to be divisible, Dalton’s atomic theory of matter had to be revised.