Question 1

Which of the following statements about the structure of the atom is correct?

Accepted Answer

The nucleus contains protons and neutrons, while electrons orbit the nucleus in a much larger electron cloud.

Question 2

Which force is responsible for holding protons and neutrons together in the nucleus?

Accepted Answer

Nuclear force

Question 3

How many neutrons are present in the isotope $^{43}_{20}\mathrm{Ca}$?

Accepted Answer

23

Question 4

Which of the following elements is a metalloid that is also a chalcogen?

Accepted Answer

Te

Question 5

Which of the following best describes the trend in atomic radius across a period from left to right?

Accepted Answer

Atomic radius decreases

Question 6

Which of the following elements would have the greatest metallic character?

Accepted Answer

Rb

Question 7

Which of the following electron transitions in the Bohr model represents absorption with the greatest energy?

Accepted Answer

$n=1$ to $n=4$

Question 8

A carbon–oxygen double bond within a sugar molecule absorbs electromagnetic radiation at a frequency of $6.0 	imes 10^{12}\ \mathrm{s}^{-1}$. What portion of the electromagnetic spectrum does this represent?

Accepted Answer

Infrared

Question 9

Which of the following elements is a nonmetal that is a homonuclear polyatomic solid at room temperature?

Accepted Answer

Sulfur

Question 10

Which of the following is NOT a component of Dalton’s Atomic Theory as originally stated?

Accepted Answer

Atoms are composed of protons, neutrons, and electrons.

Question 11

Which of the following atoms has the largest atomic radius?

Accepted Answer

Rb

Question 12

Which of the following elements would lose an electron the easiest?

Accepted Answer

Li

Question 13

Which of the following has the highest ionization energy?

Accepted Answer

Ar

Question 14

Which of the following is a representative element, found in the 3rd Period, that is also a pnictogen?

Accepted Answer

P

Question 15

Which of the following sources of electromagnetic radiation will have the highest energy?

Accepted Answer

Light A ($595\ \mathrm{nm}$)

Question 16

Which of the following statements is consistent with Dalton’s atomic theory as it was originally stated?

Accepted Answer

All lead atoms are identical and barium and chlorine atoms combine in a 1:2 ratio to form barium chloride.

Question 17

Which of the following is a transition metal in the 5th Period with similar chemical properties to copper, Cu?

Accepted Answer

Silver, Ag

Question 18

Which of the following elements is a metalloid?

Accepted Answer

Si

Question 19

Which of the following elements is a metal in the 4th Period?

Accepted Answer

Calcium, Ca

Question 20

Which of the following is a polyatomic element?

Accepted Answer

Sulfur

Atoms, Elements, and the Periodic Table: Foundations for Organic Chemistry

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