1.- Sabemos que los isótopos más estables del azufre son 3. El S-32, S-33 y S-X. Si la masa atómica promedio del azufre es 32,09u y las abundancias relativas del azufre son 95% para el
S-32; 1% para el S-33 y 4% para el S-X. Averigua el número másico del azufre S-X.

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.

level 4 to level 2 : ))

c. electrical charges of ionic bonds.