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- 1. Multiple Choice
An element is a solid at room temperature, has luster, is conductive and malleable. During experimentation, it is found to have various ionic forms sometimes possessing a 2+ charge and others a 3+ charge. This element is most likely found in which area of the periodic table?
Alkali metal family
Alkaline earth metal family
Transition metals
Halogen family
- 2. Multiple Choice
Which periodic family has a full outermost valence shell and rarely reacts with other elements?
Alkali metals
Alkaline Earth metals
Halogens
Noble gases
- 3. Multiple Choice
Which of these elements is the most reactive?
potassium
Calcium
Scandium
Titanium
- 4. Multiple Choice
Chlorine, bromine, and iodine are halogens and share similar chemical properties. However, these elements have some very different physical properties. At room temperature, chlorine is a gas, bromine is a liquid, and iodine is a solid. Predict the physical states of fluorine at room temperature.
solid
liquid
gas
plasma
- 5. Multiple Choice
Neon is a noble gas. Which of the following describes neon?
Neon has a very low chemical reactivity.
Neon is highly electronegative.
Neon is a solid at room temperature.
Neon is a good conductor of heat.
- 6. Multiple Choice
Magnesium is an alkaline earth metal. With which group of elements is magnesium most reactive?
nonmetals
noble gases
alkali metals
transition metals
- 7. Multiple Choice
Alkali metals react very readily with halogens and form ionic compounds such as table salt (NaCI) and many others. Which of the following explanations most completely describes why these two families of elements reacts readily?
Alkali metals are negative and halogens are positive, so they attract each other.
The alkali metals have one valence electron, and the halogens are one short of an octet.
Alkali metals and halogens can very easily share eight valence electrons between them.
The halogens very easily donate valence electrons to the alkali metals so that all have eight.
- 8. Multiple Choice
From which of the following atoms would it be the most difficult to remove an electron?
Sodium
Aluminum
Sulfur
Chlorine
- 9. Multiple Choice
Using the Periodic Table, predict which elements will have similar chemical properties or reactivity.
Cadmium, calcium, and carbon
Magnesium, strontium, and barium
Rubidium, yttrium, and zirconium
Nitrogen, sulfur, and bromine
- 10. Multiple Choice
A sample of an unknown element, Gg, exhibits the following properties.
• Exists naturally as a diatomic gas
• Easily forms anions by accepting electrons
• Reacts violently with alkali metals
To which chemical family does element Gg most likely belong?
Alkaline Earth Metals
Metalloids
Halogens
Noble gases
- 11. Multiple Choice
A sample of an unknown element, Xx, exhibits the following properties.
• Reacts with oxygen to form XxO
• Has a silver metallic luster
• Has a low melting point
To which chemical family does element Xx most likely belong?
Alkali metals
Alkaline earth metals
Transition metals
Metalloids
- 12. Multiple Choice
Which sequence of atomic numbers represents elements that have similar chemical properties?
3, 12, 21, 40
4, 20, 38, 88
9, 16, 33, 50
19, 23, 30, 36
- 13. Multiple Choice
The properties of carbon are expected to be most similar to those of —
phosphorus.
silicon.
boron.
aluminum.
- 14. Multiple Choice
Which statement explains why sulfur is classified as a Group 16 element?
A sulfur atom has 6 valence electrons.
A sulfur atom has 16 neutrons.
Sulfur reacts with most metals
Sulfur is a yellow solid at STP
- 15. Multiple Choice
At which location in the Periodic Table would the most active metallic element be found?
In Group 1, at the top
In Group 17, at the top
In Group 17, at the bottom
In Group 1, at the bottom
- 16. Multiple Choice
Which element is a member of the halogen family?
K
S
I
B
- 17. Multiple Choice
As the atomic number on the Periodic Table increases, the number of electrons ―
is unchanged
alternates
decreases
increases
- 18. Multiple Choice
Mendeleev organized his periodic table in order of increasing atomic —
mass
number
radius
stability
- 19. Multiple Choice
Moseley's research suggested that elements should be sorted by increasing atomic —
Mass
Number
Radius
Stability
- 20. Multiple Choice
After Mendeleev constructed the periodic table, he predicted the discovery of several elements that were not yet known. What prediction was Mendeleev able to make about these unknown elements, based on his table?
chemical and physical properties
electron structures of their atoms
likely geographic locations where they could be found
their relative abundance in various mineral deposits
- 21. Multiple Choice
Chlorine, bromine, and iodine were grouped together in the earliest forms of the periodic table, including the table developed by Mendeleev. What was an organizing principle in this grouping at that time?
Atoms of the three elements had approximately the same mass.
The three elements reacted the same way with other elements.
The elements had the same number of valence electrons
These three elements were all gases at room temperature.
- 22. Multiple Choice
In the 1860s, Dmitri Mendeleev designed a Periodic Table of elements based on extensive research and observations. He left several gaps in his Periodic Table for elements that had yet to be discovered.
A section of a Periodic Table with one such gap is shown above.
Which of the following sets of data could match the unknown element?
Non-metal, Mass: 72
Metalloid, Mass: 78
Reactive metal, Mass: 71
Metalloid, Mass: 74
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