Chemistry: Elements Form Compounds, assignment help

QUESTION 1

1. A single atom of hydrogen could combine with a single atom of chlorine, creating electron energy stability for both atoms.
   

   		TRUE
   		FALSE

2 points

QUESTION 2

1. Magnesium would acquire a stable arrangement of electrons by bonding with one atom of which of the following elements?
   

   		oxygen
   		chlorine
   		helium
   		nitrogen

3 points

QUESTION 3

1. The bond between hydrogen and oxygen in H₂O is ionic.
   

   		TRUE
   		FALSE

2 points

QUESTION 4

1. Which of the following does not possess an ionic bond?
   

   		BaO
   		PCl5
   		NaI
   		K2O

3 points

QUESTION 5

1. The name for the compound CaCl₂ is calcium chlorite.
   

   		TRUE
   		FALSE

2 points

QUESTION 6

1. The name of the compound Sr(ClO)₂ is:
   

   		Strontium chlorate
   		Strontium chloride
   		Strontium chlorite
   		Strontium hypochlorite

3 points

QUESTION 7

1. The chemical formula for barium nitride is Ba(NO₃)₂.
   

   		TRUE
   		FALSE

2 points

QUESTION 8

1. The chemical formula for potassium perchlorate is:
   

   		KClO
   		PClO3
   		KClO4
   		KClO2

3 points

QUESTION 9

1. Solid lithium chloride is an excellent conductor of electricity.
   

   		TRUE
   		FALSE

2 points

QUESTION 10

1. Which of the following will have the highest melting point?
   

   		C6H12O6
   		KCl
   		NH3
   		I2

3 points

QUESTION 11

1. Covalent bonds exist where two atoms equally share electrons.
   

   		TRUE
   		FALSE

2 points

QUESTION 12

1. Which of the following represents a purely covalent bond?
   

   		Ne – Ne
   		Na – Na
   		N – N
   		Ni – O

3 points

QUESTION 13

1. The name of the compound, SCl₆, is sulfur hexachloride.
   

   		TRUE
   		FALSE

2 points

QUESTION 14

1. Which of the following is the name for XeF₄?
   

   		Monoxenon fluoride
   		Xenon tetrafluorate
   		Xenon tetrafluorite
   		Xenon tetrafluoride

3 points

QUESTION 15

1. The molecular formula for dihydrogen monoxide is H₂O.
   

   		TRUE
   		FALSE

2 points

QUESTION 16

1. When correctly drawn, the Lewis dot structure for NH₃ should have a lone pair of electrons on the central N.
   

   		TRUE
   		FALSE

2 points

QUESTION 17

1. Which is the first step in creating a Lewis dot structure for a molecule?
   

   		Connect each outer atom to the other outer atoms
   		Place electrons as lone pairs on the central atom
   		Determine the total number of valence electrons available from all atoms
   		Share lone pairs of electrons to complete the octet of every atom

3 points

QUESTION 18

1. Covalent compounds generally have high melting points.
   

   		TRUE
   		FALSE

2 points

QUESTION 19

1. Which of the following could create an incorrect Lewis dot structure for H₂O?
   

   		Showing the H atom as the central atom
   		Showing four pairs of electrons around the O atom
   		Adding valence electrons and core electrons into the total electrons available
   		Both a and c

3 points

QUESTION 20

1. Covalent compounds generally have high melting points.
   

   		TRUE
   		FALSE

2 points

QUESTION 21

1. Which is true about covalent compounds?
   

   		Have a high melting point
   		Conduct electricity when dissolved in water
   		Have a low boiling point
   		Are extremely hard

3 points

QUESTION 22

1. Resonance structures exist for a compound when two (or more) Lewis structures need to be drawn to represent the compound.
   

   		TRUE
   		FALSE

2 points

QUESTION 23

1. Determine the number of resonance structures for the formate ion, HCO₂⁻.
   

   		2
   		3
   		4
   		Formate ion does not possess resonance structures, as there is only one Lewis structure to describe it.

3 points

QUESTION 24

1. Potassium is an exception to the octet rule and can hold up to 12 electrons in its valence electron energy level in a compound.
   

   		TRUE
   		FALSE

2 points

QUESTION 25

1. Which of the following is not an example of an expanded octet?
   

3 points

QUESTION 26

1. When a molecule contains three bonds and a single lone pair attached to the central atom, the molecular geometry is trigonal planar.
   

   		TRUE
   		FALSE

2 points

QUESTION 27

1. What is the molecular geometry of ClF₃?
   

   		trigonal planar
   		trigonal bipyramidal
   		T-shaped
   		seesaw

3 points

QUESTION 28

1. The molecule shown below is nonpolar.
   

   		TRUE
   		FALSE

2 points

QUESTION 29

1. Which of the following molecules is nonpolar?
   

3 points

QUESTION 30

1. In general, molecules that possess hydrogen bonding forces do not possess any other types of forces.
   

   		TRUE
   		FALSE

2 points

QUESTION 31

1. What is the main type of intermolecular force exhibited in liquid C₂H₆?
   

   		London dispersion force
   		Dipole-dipole force
   		Hydrogen bonding force
   		Ionic bonding

3 points

QUESTION 32

1. The reason chlorine is a gas while bromine is a liquid at room temperature is because they contain different intermolecular forces.
   

   		TRUE
   		FALSE

2 points

QUESTION 33

1. Which of the following liquids would boil at the lowest temperature?
   

   		N2
   		H2S
   		H2O
   		NH3

3 points

QUESTION 34

1. Carbon is a synthetic element and is not normally found in nature.
   

   		TRUE
   		FALSE

2 points

QUESTION 35

1. Carbon is often found in long chains composed of carbon and:
   

   		calcium
   		sodium
   		hydrogen
   		fluorine

3 points

QUESTION 36

1. The name of the organic compound below is methanol.
   

   		TRUE
   		FALSE

2 points

QUESTION 37

1. The molecule contains two of which functional group?
   

   		ether
   		aldehyde
   		alcohol
   		hydroxide

3 points

QUESTION 38

1. Amino acids contain the following functional group:
   

   		TRUE
   		FALSE

2 points

QUESTION 39

1. Phenol is an organic compound that contains which functional group?
   

3 points

QUESTION 40

1. Which of the following is not an example of a biological polymer?
   

   		Amino acid
   		Hair protein, Keratin
   		Potato starch
   		Glycogen

3 points

 

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