The table compares some characteristics of two atoms.

Charged Particles
Atom Number of Neutrons Mass Number
X 6 12
Y 7 13

Use the table to determine the number of protons for each atom. Then, choose the statement below that is true about the two atoms. (5 points)

Atom X and Atom Y are in the same row, but not the same family, on the periodic table.

Atoms X and Atom Y are in the same family, but not the same row, in the periodic table.

Atom X is in a column to the right of Atom Y in the periodic table.

Atom X and Atom Y occupy the same position in the periodic table because they are isotopes.

               Atom X and Atom Y occupy the same position in the periodic table because they are isotopes

Explanation:

            The table is as follow;

Atom/Charged particle                  # of neutrons                Mass #

                X                                              6                                12

               Y                                             7                                13

As we know the Mass number is the total number of protons and neutrons in the nucleus of an atom so,

Mass #  =  # of Protons + # of Neutrons

Solving above equation for protons,

# of Protons  =  Mass # - No. of Neutrons

For Atom X:

# of Protons  =  12 - 6

# of Protons  =  6

For Atom Y:

# of Protons  =  13 - 7

# of Protons  =  6

Hence, it can be concluded that the number of protons for both atoms are the same. Also, we also know that atoms having same no. of protons (atomic number) are the same elements.

Conclusion:

                  Atom X and Atom Y are two isotopes of Carbon with atomic number 12. One isotope has a mass number of 13 and have a chemical symbol of ¹³₆C while the other has mass number of 12 and with chemical symbol of ¹²₆C.

heat or electricity in the atmosphere- c.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"