Radioactive emissions - OCR Gateway

1

Uranium-235 has 92 protons. How many neutrons does it have?

2

What are isotopes of an element?

3

What is gamma radiation?

4

Which form of radiation has the greatest ionising ability?

5

Which particle has an ionised atom lost?

6

What is an alpha particle?

7

Which energy level in an atom is the lowest?

8

What is name of the process by which an electron moves to a higher energy level in an atom?

9

Which statement about the radioactive decay of an atom is correct?

10

What fraction of a radioisotope is left after two half-lives?