Structure of atom class 9 blank quiz medium

Class 9 Science - Structure of Atom Quiz

11. The particles that have no charge and are located in the nucleus of an atom are called ________.

12. The number of neutrons in the nucleus of an atom is equal to its ________ number minus its atomic number.

13. The total number of protons and neutrons in the nucleus of an atom is also known as its ________ mass.

14. Atoms of the same element with different numbers of neutrons are called ________.

15. The number of electron shells or energy levels in an atom is indicated by its ________ number.

16. The negatively charged particles that move around the nucleus of an atom are called ________.

17. The positively charged particles in the nucleus of an atom are called ________.

18. The atomic number of an element determines its ________ properties.

19. The atomic number of an element is equal to the number of ________ in its nucleus.

20. The total number of protons and neutrons in the nucleus of an atom is called its ________ number.