Group 1 Flashcards – AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher

How does reactivity change down Group 1?

Reactivity increases down the group.

Why does reactivity increase down Group 1?

The outer-shell electron is farther from the nucleus and more easily lost. Group 1 reactions depend on losing this electron.

What are the Group 1 elements called?

The alkali metals.

How many outer-shell electrons does a Group 1 atom have?

One.

Why do Group 1 atoms form ions with a +1 charge?

They can relatively easily lose their single outer-shell electron.

Why do Group 1 elements undergo similar types of reactions?

Their chemical behavior depends strongly on their shared one outer-shell electron.

What are the first three alkali metals?

Lithium, sodium and potassium.

What products form when lithium, sodium or potassium reacts with oxygen?

Metal oxides.

What products form when lithium, sodium or potassium reacts with chlorine?

White ionic metal chlorides.

What products form when lithium, sodium or potassium reacts with water?

A metal hydroxide solution and hydrogen gas.

What do the reactions of lithium, sodium and potassium show about the reactivity of Group 1 metals?

Group 1 metals are very reactive.

How can known properties of Group 1 elements be used to predict a missing value or compare elements?

Arrange the known values or descriptions in group order, identify the pattern, then use it to make the prediction.

What two forms can a prediction of a Group 1 property take?

A qualitative description or an approximate numerical estimate, depending on the information available.

How should the direction and size of a trend be established for Group 1 properties?

Establish them separately for each property.

How certain is an estimate beyond the available Group 1 data compared with observed values?

It is less certain than the observed values.