C2 Periodic Table Flashcards
Who created the periodic table?
Dmitri Mendeleev.
How are elements arranged in the periodic table?
Elements are arranged by increasing atomic number and grouped into periods and groups.
What is a group in the periodic table?
A group is a vertical column of elements with similar chemical properties.
What is a period in the periodic table?
A period is a horizontal row of elements where properties change progressively across the period.
What are alkali metals (Group 1) known for?
Alkali metals are highly reactive, with one electron in their outer shell.
What are halogens (Group 7) known for?
Halogens are nonmetals, highly reactive, and have seven electrons in their outer shell.
What are noble gases (Group 0) known for?
Noble gases are inert, with a full outer electron shell, making them stable and non-reactive.
What is the trend in reactivity down Group 1?
Reactivity increases as you go down Group 1 because the outer electron is further from the nucleus.
What is the trend in reactivity down Group 7?
Reactivity decreases as you go down Group 7 because the outer shell becomes further from the nucleus.
What is the atomic structure of a noble gas?
Noble gases have a full outer electron shell, making them chemically stable.
How does atomic size change across a period?
Atomic size decreases across a period because electrons are added to the same energy level and the nucleus pulls them closer.
How does atomic size change down a group?
Atomic size increases as you go down a group because additional electron shells are added.
What are transition metals?
Transition metals are elements found in the middle of the periodic table, known for their ability to form multiple ions.
What are metalloids?
Metalloids are elements that have properties of both metals and nonmetals.
How do alkali metals react with water?
Alkali metals react vigorously with water to form an alkaline solution and hydrogen gas.
How do halogens react with alkali metals?
Halogens react with alkali metals to form ionic salts.
What is the electron configuration of Group 1 elements?
Group 1 elements have one electron in their outer shell.
What is the electron configuration of Group 7 elements?
Group 7 elements have seven electrons in their outer shell.
What is the significance of a full outer shell in noble gases?
A full outer shell makes noble gases stable and unreactive.
Why are noble gases chemically inert?
Noble gases are chemically inert because they have a full outer electron shell.
What is the trend in boiling and melting points in Group 7?
The boiling and melting points of halogens increase as you go down the group.
What is the trend in the density of alkali metals down Group 1?
The density of alkali metals increases as you go down Group 1.
What is an example of a halogen?
Chlorine (Cl) is an example of a halogen.
