Alkali and Alkaline Earth Metals

How are alkali metals stored in order to retain its purity?

• Submerged in water

• Stored in air-tight facilities

• Submerged in oil

• Buried in metal tins

What kind of ions do they produce?

• Double positive

• Single positive

• Double negative

• Single negative

Which is the most reactive metal in this group?

• Sodium

• Potassium

• Rubidium

• Francium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Alkali metals react with water to form:

• Water and metal hydroxide

• Water and metal oxide

• Metal hydroxide and oxygen

• Metal oxide

Tags

NGSS.HS-PS1-1

What type of reaction is an alkali metal combining with water?

• Decomposition

• Exothermic

• Endothermic

• Displacement

Tags

NGSS.HS-PS1-4

What equipment is used to measure intensity of a flame colour?

• Thermometer

• Bunsen burner

• Flame photometer

• Filter paper

Why are flame photometers used in hospitals?

• To recognize burns of several degrees

• To check if balance sodium and potassium ions are balanced

• To read X-Ray results

• To colourize X-Ray results and detect anomalies

What is the flame color of sodium?

• Blue

• Orange

• Yellow

• Red

What is sodium hydrogen carbonate used for?

• To descale kettles

• To treat alkaline soil

• To ingest as antacids

• To wash dishes

What is sodium hydroxide used for?

• To treat alkaline soil

• To remove impurities from water

• To oxidize gunpowder

• To fertilize soil