Question

carbon-12 and carbon-13 are isotopes of carbon. which of the following statements is correct? they both have seven protons in the nucleus. they both have the same mass number. they both have seven neutrons in the nucleus. they both have the same atomic number.

Explanation:

同位素是具有相同质子数、不同中子数的同一元素的不同核素。碳 - 12和碳 - 13是碳的同位素，原子序数等于质子数，它们质子数相同，所以原子序数相同。碳的质子数是6不是7，碳 - 12和碳 - 13质量数分别是12和13不同，碳 - 12中子数为6，碳 - 13中子数为7。

Answer:

They both have the same atomic number.