(c) Mendeleev was convinced of the importance of arranging elements in the periodic table in accordance with trends therefore he questioned the accuracy of the atomic masses of several elements. One place you can see this is in the fourth period; identify the elements involved, and explain why he questioned the atomic masses. ​

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.

that's what i got you can count the number of atoms

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?