Alkali metals and Halogens

In which group of the periodic table are the alkali metals?

• Group 2

• Group 7

• Group 1

• Group 0

How many outer shell electrons do the halogens have?

• 1

• 7

• 2

• 8

Tags

NGSS.HS-PS1-1

The halogens become _______ reactive as you go down the group.

• less

• more

Tags

NGSS.HS-PS1-2

Alkali metals become more reactive as you go down the group. This is due to...

• the metals have more electrons

• the distance between nucleus and outer shell increases

• the distance between the nucleus and outer shell decreases

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When hologens react, they ______ electron(s).

• gain 1

• lose 1

• gain 2

• lose 7

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Alkali metals react with water to produce...

• metal oxide

• non-metal oxides

• metal hyrdoxides

• non-metal hydroxides

This reaction will take place:

Cl₂ + 2KBr --> Br₂ + 2KCl

• True

• False

Hydrogen halides (e.g. HBr_(aq)) are alkaline when dissolved in water.

• True

• False

Give two properties of alkali metals.

• High melting points

• Good conductors of electricity

• Strong

• Low melting points

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Select the correct equation for the reaction between potassium and water:

• 2K + 2H₂O --> 2KH₂ + O₂

• K + H₂O --> KO + H₂

• 2K + 2H₂O --> 2KOH + H₂

• 3K + 2H₂O --> K₃O₂ + 2H₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2