Chapter 5-3 Booklet and Packet questions
Hydrogen- A Unique Element
The most abundant element in the universe.
How many electrons does an oxygen atom gain to form an oxide ion?
Two electrons.
Scientists store some reactive chemicals in containers filled with argon. Why?
Argon will not react with th e elements.
How many valence electrons do noble gases have?
Eight but Helium has two.
What are semiconductors?
Elements that can conduct under certain circumstances.
Where are transition metals located on the periodic table?
In the middle (groups 3-12).
Why is Hydrogen not considered an alkali metal?
It has different properties than alkali metals.
Describe the reactivity of transition metals.
Less reactive than alkali and alkaline metals; it gets less reactive as it gets closer to the middle.
Which element is more reactive- lithium, Li, or beryllium, Be? Explain your answer.
Lithium is more reactive because it only has to lose one electron while beryllium has to lose two.
Why do Na and Cl readily form a compound?
One element needs to gain an electron and the other needs to lose an electron.
In general, what do all elements in the same family have in common?
Same properties and same number of valence electrons.
Why do noble gases exist as single atoms instead of compounds?
Their outer shell is full.
Describe the reactivity of alkaline earth metals.
They are a little less reactive than alkali metals, but are still reactive.
What are synthetic elements?
They are all man-made elements. Atomic number is greater than 92.
How does the location of semiconductors on the periodic table differ from the locations of other element families?
They are in a stair step line.
Why are alkali metals rarely found as pure elements?
They are very reactive, so they form compounds.
Why can transition metals form different types of ions?
They have a more complex arrangement of electrons.
Do alkaline electrons lose electrons or gain electrons?
They lose electrons
Why are alkali metals so reactive?
They only have one valence electron and it can easily be taken away.
A particular substance is typically found in nature as a pure element. What can you conclude about the reactivity of this element? (Hint" Which family contains elements that are generally found as pure elements?)
Transition metal because it is barely reactive.
