The open spaces in the table are to be filled. Concept introduction: The elements in a modern periodic table are arranged in an increasing order of their atomic number . The horizontal rows are known as periods, and vertical columns are known as groups. There are 7 periods and 18 groups in a modern periodic table. They are categorized into groups based on the type of energy sublevel that the last valence electron of the element enters.

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Answer 1

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Chapter 5, Problem 49E

Interpretation Introduction

Interpretation:

The open spaces in the table are to be filled.

Concept introduction:

The elements in a modern periodic table are arranged in an increasing order of their atomic number. The horizontal rows are known as periods, and vertical columns are known as groups. There are $7$ periods and $18$ groups in a modern periodic table. They are categorized into groups based on the type of energy sublevel that the last valence electron of the element enters.

Expert Solution & Answer

Answer to Problem 49E

The open spaces in the table are filled as shown below.

Table 5-4	Table of Elements
Name of Element		Atomic Number	Symbol of Element
Magnesium		$12$	$Mg$
Oxygen		$8$	$O$
Phosphorus		$15$	$P$
Calcium		$20$	$Ca$
Zinc		$30$	$Zn$
Lithium		$3$	$Li$
Nitrogen		$7$	$N$
Sulfur		$16$	$S$
Iodine		$53$	$I$
Barium		$56$	$Ba$
Potassium		$19$	$K$
Neon		$10$	$Ne$
Helium		$2$	$He$
Bromine		$35$	$Br$
Nickel		$28$	$Ni$
Tin		$50$	$Sn$
Silicon		$14$	$Si$

Explanation of Solution

The number of protons of an element is equal to its atomic number. The symbol of magnesium is $Mg$ . The atomic number of magnesium is $12$ . Magnesium has $12$ protons and $12$ electrons.

The symbol of oxygen is $O$ . The atomic number of oxygen is $8$ . Oxygen has $8$ protons and $8$ electrons.

The symbol of phosphorus is $P$ . The atomic number of phosphorus is $15$ . Phosphorus has $15$ protons and $15$ electrons.

The symbol of calcium is $Ca$ . The atomic number of calcium is $20$ . Calcium has $20$ protons and $20$ electrons.

The symbol of zinc is $Zn$ . The atomic number of zinc is $30$ . Zinc has $30$ protons and $30$ electrons.

The symbol of lithium is $Li$ . The atomic number of lithium is $3$ . Lithium has $3$ protons and $3$ electrons.

The symbol of nitrogen is $N$ . The atomic number of nitrogen is $7$ . Nitrogen has $7$ protons and $7$ electrons.

The symbol of sulfur is $S$ . The atomic number of sulfur is $16$ . Sulfur has $16$ protons and $16$ electrons.

The symbol of iodine is $I$ . The atomic number of iodine is $53$ . Iodine has $53$ protons and $53$ electrons.

The symbol of barium is $Ba$ . The atomic number of barium is $56$ . Barium has $56$ protons and $56$ electrons.

The symbol of potassium is $K$ . The atomic number of potassium is $19$ . Potassium has $19$ protons and $19$ electrons.

The symbol of neon is $Ne$ . The atomic number of neon is $10$ . Neon has $10$ protons and $10$ electrons.

The symbol of helium is $He$ . The atomic number of helium is $2$ . Helium has $2$ protons and $2$ electrons.

The symbol of bromine is $Br$ . The atomic number of bromine is $35$ . Bromine has $35$ protons and $35$ electrons.

The symbol of nickel is $Ni$ . The atomic number of nickel is $28$ . Nickel has $28$ protons and $28$ electrons.

The symbol of tin is $Sn$ . The atomic number of tin is $50$ . Tin has $50$ protons and $50$ electrons.

The symbol of silicon is $Si$ . The atomic number of silicon is $14$ . Silicon has $14$ protons and $14$ electrons. Therefore, the completed table is shown below.

Table 5-4	Table of Elements
Name of Element		Atomic Number	Symbol of Element
Magnesium		$12$	$Mg$
Oxygen		$8$	$O$
Phosphorus		$15$	$P$
Calcium		$20$	$Ca$
Zinc		$30$	$Zn$
Lithium		$3$	$Li$
Nitrogen		$7$	$N$
Sulfur		$16$	$S$
Iodine		$53$	$I$
Barium		$56$	$Ba$
Potassium		$19$	$K$
Neon		$10$	$Ne$
Helium		$2$	$He$
Bromine		$35$	$Br$
Nickel		$28$	$Ni$
Tin		$50$	$Sn$
Silicon		$14$	$Si$

Conclusion

The open spaces in the table have been rightfully filled.

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