Inorganic Chemistry

What is the trend of reactivity for elements in Group 1?

the reactivity of elements increases as you move down the group

Explain the trend of reactivity in group 1 alkali metals

To achieve a stable electron configuration, they need to lose a single electron to form a +1 positive ion

—>higher the atomic radius, the easier it is to lose an electron

What are the properties of alkali metals?

low density, softness, and low melting points

how do alkali metals react with water?

react vigorously to form an alkaline metal hydroxide solution and hydrogen gas.

What is the trend of reactivity for elements in Group 7?

The reactivity of elements in Group 7 (halogens) decreases as you go down the group

What is the colour and physical state (at room temperature) of fluorine?

pale yellow gas

What is the colour and physical state (at room temperature) of chlorine?

pale yellow-green gas

What is the colour and physical state (at room temperature) of bromine?

dark reddish-brown liquid

What is the colour and physical state (at room temperature) of iodine?

purple-black solid

What is the colour and physical state (at room temperature) of astatine?

black (or dark brown/metallic-looking) solid

what is the trend in reactivity in Group 7 in terms of electronic configurations?

Moving down Group 7, each element has an additional electron shell, which increases atomic radius of atom—> outer shell is further from the positively charged nucleus—> weaker attraction to nearby electrons