Groups 1 And 0 Flashcards
What are alkali metals?
Alkali metals are elements in Group 1 of the periodic table, including
These are examples of Alkali metals
lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
What is the general property of alkali metals?
Alkali metals are highly reactive, especially with water, and are characterized by having one electron in their outermost shell.
How do alkali metals react with water?
Alkali metals react vigorously with water to produce hydrogen gas and an alkaline solution (hydroxide).
What happens when potassium reacts with water?
Potassium reacts explosively with water, producing potassium hydroxide (KOH) and hydrogen gas.
Why are alkali metals stored in oil?
Alkali metals are stored in oil to prevent them from reacting with moisture or oxygen in the air.
What is the trend in reactivity in alkali metals?
Reactivity increases as you move down Group 1, with lithium being the least reactive and francium the most reactive.
What do alkali metals form when they combine with halogens?
Alkali metals form ionic salts, such as sodium chloride (NaCl) when they react with halogens.
What is the color of the flame when lithium burns?
red flame.
What is the flame color for sodium?
yellow flame.
What are noble gases?
Noble gases are elements in Group 0 of the periodic table
Examples are
helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
is the main characteristic of noble gases?
Noble gases are inert, meaning they are chemically stable and do not readily react with other elements due to having a full outer electron shell.
Which noble gas is used in neon signs?
Neon (Ne) is used in neon signs, giving them a characteristic bright red-orange glow.
Why are noble gases considered non-reactive?
Noble gases have a complete set of electrons in their outermost shell, making them stable and unlikely to form compounds.
Which noble gas is used in light bulbs?
Argon (Ar) is commonly used in light bulbs to prevent the filament from oxidizing.
What is the use of helium?
Helium (He) is used in balloons, airships, and as a cooling medium in cryogenics.
What is the trend in boiling points in noble gases?
boiling points of noble gases increase as you move down the group, with helium having the lowest and radon having the highest.
Which noble gas is the heaviest?
Radon (Rn) is the heaviest noble gas.
What is the color of neon gas?
gas is colorless, but it emits a reddish-orange glow when electrically excited.
How does argon help in welding?
Argon is used in welding to provide an inert atmosphere, preventing the metal from reacting with oxygen or nitrogen in the air.
