Unit 5 – Chemistry Flashcard

In developing his periodic trend, Mendeleeve listed on cards each element’s name, chemical and physical properties, and

A. electron configuration
B. atomic mass
C. country of origin
D. isotopes
E. chemical and physical properties

The best way to estimate the boiling point of Pd is to

A. average the boiling points of Ni and Pt
B. average the boiling points of Rh and Ag
C. average the boiling points of Ir and Cu
D. average the boiling points of Co and Au
E. none of the answer choices given will work

Uranium, thorium, and plutonium are

A. lanthanides
B. alkaline earch metals
C. metalloids
D. actinides
E. noble gases

As represented on the periodic table, the periodic law states that the physical and chemical properties of elements are periodic functions of their

A. atomic numbers
B. atomic masses
C. atomic weighs
D. periodic functions
E. atomic radii

George was studying the alkaline earth metals. How many valence electrons does a Boron atom have?

A. 7
B. 3
C. 6
D. 5
E. 4

Elements are chemically similar to calcium can interfere with the function of neurons. Which of the following is most likely to imitate calcium’s role in the function of neurons?

A. Magnesium
B. Potassium
C. Rubidium
D. Krypton
E. Sodium

In which of the following pairs is the first element expected to have a high electronegativity than the second?

A. Sb, As
B. O, P
C. Al, P
D. I, Br
E. Cs, Rb

Which of the following is expected to have the largest third ionization level?

A. N
B. B
C. Be
D. C
E. Al

Elements in the halogen group have the properties of

A. gases
B. metals
C. nonmetals
D. metalloids
E. liquids

Chemical properties of elements are primarily defined by the

A. electronegativity
B. protons
C. ionization level
D. neutrons
E. electrons

The elements contained in the lanthanide and actinide series are placed seperately because they

A. are gases
B. have many unique properties
C. have 3 valence electrons
D. are filling up the f-suborbitals
E. have 2 neutrons

Which pair of elements is expected to have the most similar properties?

A. lithium and sodium
B. lithium and calcium
C. fluorine and iodine
D. sulfur and phosphorus
E. silicon and carbon

Phosphorus has 5 valence electrons. What is the predominate oxidation number of phosphorus?

A. +5
B. -2
C. -3
D. +2
E. +8

Bromine belongs to Group 17. How many electrons does bromine have in its outermost energy level?

A. 7
B. 17
C. 6
D. 35
E. 18

In which pair of elements is the larger atomis listed first?

A. K, Ca
B. Na, K
C. Mg, Na
D. Cl, S
E. O, N

The group of soft, silvery metals, all of which have one electron in the s orbital, is known as the

A. transition metals
B. halogens
C. metalloids
D. alkaline-earth metals
E. alkali metals

How many protons, neutrons, and electrons are in a neutral atom of bromine?

A. Neutrons cannnot be determined unless an isotope is specified
B. 45p, 35n, 45e
C. 35p, 45n, 35e
D. 35p, 80n, 45e
E. 80p, 35n, 80e


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