Question

104. Fill in the blanks to complete the table.

Symbol Z A
Number
of p
Number
of e−
Number
of n Charge
Si 14 ______ ______ 14 14 ______
S2 - ______ 32 ______ ______ ______ 2-
Cu2 + ______ ______ ______ ______ 34 2+
______ 15 ______ ______ 15 16 ______

Answer 1

The question involves filling in a table with atomic number, atomic mass, number of protons, electrons, and neutrons, and charge for given elements and ions, requiring knowledge of electron configurations and the periodic table.

Step-by-step explanation:

The student's question relates to completing a table that represents various properties of different atoms and ions, with an emphasis on their atomic number (Z), atomic mass (A), number of protons (p), number of electrons (e−), number of neutrons (n), and overall charge. Understanding the periodic table and electron configurations is essential to fill in the blanks correctly.

Example Answer

For silicon (Si), with an atomic number of 14 (Z = 14) and a neutral charge:

• Number of protons (p) = 14 (since Z = number of protons).
• Number of electrons (e−) = 14 (since the atom is neutral).
• Number of neutrons (n) = Atomic mass number (A) - Atomic number (Z). In this case, it is not provided, but if we assume the most common isotope of Si with A = 28, then the number of neutrons would be 28 - 14 = 14.

Answer 2

Step-by-step explanation:

Just a few things to remember:

• # of neutrons = Mass number - # protons
• Mass number = # protons + # neutrons
• Atomic Number = # of protons
• # of electrons = # of protons - charge on the atom
• Symbol - use the atomic number to find the element in the periodic table