Question 19 of 25 The atomic number of the element radium is 88. How many neutrons does radium-226 have? A. 98
B. 138
C. 88
D. 116
E. 226
please i need this

B. 138

Explanation:

Based on isotope notation:

For the atom A, the mass number, X, is the sum of neutrons and protons and

n is the number of protons = Atomic number.

The number of protons depends of the nature of the atom. For example, Carbon has 12 protons, hydrogen 1 and Radium has 88 protons.

The radium-226 means the mass number is 226. Thus, number of neutrons are:

Mass number - Atomic number

226 - 88 = 138

Right answer is:

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.