Question 1

Which of the following compounds contains exactly three elements and ten atoms per molecule?

Accepted Answer

C\_2H\_4N\_2

Question 2

Which formula represents a molecule with four phosphorus atoms and ten oxygen atoms?

Accepted Answer

P\_4O\_10

Question 3

Which statement about atomic structure is correct?

Accepted Answer

Atoms contain equal numbers of protons and electrons

Question 4

Which of the following pairs of atoms contain the same number of neutrons?

Accepted Answer

Tc-99 and Ru-99

Question 5

What is the maximum number of electrons in the n = 3 shell?

Accepted Answer

$$18$$

Question 6

How many subshells are in the n = 4 shell?

Accepted Answer

$$4$$

Question 7

Which of the following orbitals is double-lobed (bowtie shape)?

Accepted Answer

$$p$$

Question 8

Which of the following is INCORRECT regarding the location of the distinguishing electron?

Accepted Answer

D: d area of periodic table

Question 9

How many valence electrons does the representative element with the electron configuration $$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^5$$ possess?

Accepted Answer

$$7$$

Question 10

Which is the correct Lewis symbol diagram for carbon?

Accepted Answer

C with four dots, one on each side

Question 11

Which option will correctly fill in the blank to define the octet rule? Atoms will ______ electrons so each atom involved will have a noble gas configuration.

Accepted Answer

gain or share

Question 12

What is the electron configuration for a $$S^{2-}$$ ion?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^6$$

Question 13

If the electronegativity difference between two elements X and Y is 0.2, the bond between the two elements would be:

Accepted Answer

nonpolar covalent

Question 14

The notation $$Y^{3+}$$ denotes an atom that has:

Accepted Answer

lost 3 electrons

Question 15

Elements in group VA of the periodic table:

Accepted Answer

form ions with a charge of $$-3$$

Question 16

For the oxygen-18 isotope, $$^{18}O$$, what is the total number of all three types of subatomic particles present?

Accepted Answer

$$20$$

Question 17

Which of the following element-classification pairings is incorrect?

Accepted Answer

Question 18

The geometry associated with three pairs of bonded electrons and one pair of nonbonded electrons about a central atom in a molecule is:

Accepted Answer

trigonal pyramidal

Question 19

Which molecule is NOT a polar molecule?

Accepted Answer

BeCl\_2

Question 20

Which statement about ionic compounds is INCORRECT?

Accepted Answer

Ionic compounds show the characteristics of the constituent elements.

Introduction to Chemistry: Atomic Structure, Periodic Table, Chemical Bonding, and Molecular Geometry

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