Group 1 and 7 elements Flashcards
What are alkali metals?
Alkali metals are the elements in Group 1 of the periodic table, which include lithium, sodium, potassium, rubidium, cesium, and francium.
Which alkali metal is least reactive?
Lithium is the least reactive alkali metal.
True or False: Alkali metals have a high melting point.
False. Alkali metals have low melting points compared to most other metals.
What is the general trend in reactivity of alkali metals as you move down the group?
The reactivity of alkali metals increases as you move down the group.
Explain the trend in reactivity in group 1 metals
Group 1 metals have 1 extra electron on their outer electron shell.
They need to get rid of that outer electron to gain a full outer shell.
The further the outer electron shell is from the nucleus, the easier it is to lose that electron.
Fill in the blank: Alkali metals react vigorously with ______ to form hydroxides.
water
What color flame does sodium produce when burned?
Sodium produces a bright yellow flame when burned.
What are halogens?
Halogens are the elements in Group 17 of the periodic table, which include fluorine, chlorine, bromine, iodine, and astatine.
Which halogen is a gas at room temperature?
Fluorine and chlorine are gases at room temperature.
True or False: Halogens become less reactive as you move down the group.
True. Halogens become less reactive as you move down the group.
What is the color of bromine at room temperature?
Bromine is a reddish-brown liquid at room temperature.
Fill in the blank: Halogens can form ______ with metals.
salts
What happens when sodium reacts with chlorine?
Sodium reacts with chlorine to form sodium chloride (table salt).
Which halogen is the most reactive?
Fluorine is the most reactive halogen.
What is the trend in boiling points of halogens as you move down the group?
The boiling points of halogens increase as you move down the group.
Explain the trend in boiling points in halogens
Halogens are group 7 elements with 7 electrons in their outer electron shell.
Group 7 elements need to gain one extra electron to gain a full outer electron shell.
It is easier to gain more electrons when close to the nucleus
Name one property that alkali metals and halogens have in common.
Both alkali metals and halogens are highly reactive.
