Which of the following quantities are conserved in all nuclear reactions?
1) Electric charge
2) Number of nuclei
3) Number of protons
If 3 only is correct.
If 1 only is correct.
If 1 and 2 are correct.
If 1 and 3 are correct.
An atom is represented by ¹⁷8X. Which of the nuclides below is an isotope of this atom?
¹⁶8X.
¹⁷9X.
¹⁶7X.
¹⁷7X.
