The atomic number of carbon-13 is thirteen. The atomic mass of carbon-13 is thirteen. If different atoms have the same number of protons but different numbers of neutrons they are called . Substances composed of atoms that all have the same number of protons are called . Atoms that have gained or lost electrons and are no longer electrically neutral are called . The nucleus of an atom always contains one or more . The orbitals of an atom contain negatively charged particles called .

Explanation:

If different atoms have the same number of protons but different numbers of neutrons they are called _ISOTOPES . Substances composed of atoms that all have the same number of protons are called ___ISOTOPES . Atoms that have gained or lost electrons and are no longer electrically neutral are called IONS . The nucleus of an atom always contains one or more _NUCLEONS . The orbitals of an atom contain negatively charged particles called __ELECTRONS

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

there is none because earth is stationary and flat.