Alkali metals and halogens

Halogens exist as .....

• atoms

• ions

• diatomic molecules

• triatomic molecules

The melting and boiling points of halogens __________ down group 7.

• decrease

• remains unchanged

• increase

• intact

In which group of the periodic table is alkali metals found?

• group 2

• group 7

• group 10

• group 1

Which of the following is the least reactive in water?

• Caesium

• Lithium

• Rubidium

• Sodium

Tags

NGSS.HS-PS1-2

Which of the following is the most reactive in water?

• Rubidium

• Potassium

• Caesium

• Sodium

The most reactive halogen in group 7 is .....................

• fluorine

• bromine

• iodine

• chlorine

Fluorine is able to displace bromine from sodium bromide solution because ......

• sodium bromide is dense

• fluorine is more reactive than bromine

• sodium is very reactive

• fluorine is less reactive than bromine

Tags

NGSS.HS-PS1-1

_______ the number of valence electrons each halogen atom has.

• 1

• 7

• 2

• 5

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is NOT an alkali metal?

• Cs

• Cl

• Li

• K

The alkali metal with the smallest atom is ____.

• Na

• Rb

• Li

• Fr