C4.1 Groups 1, 7, 0 and TM

The main elements of Group 1 are known as what?

• Alkali metals

• Noble gases

• Halogens

• Transition metals

Group 1 elements have similar chemical and physical properties because:

• they have the same number of valence electrons.

• they are in the same period.

• they have different atomic numbers.

• they have similar atomic masses.

The general physical properties of Group 1 metals include:

• High density and high melting points

• Low density and low melting points

• High density and low melting points

• Low density and high melting points

Alkali metals are stored in which of the following ways, and why?

• In water, to keep them reactive

• In oil, to prevent reaction with air and moisture

• In open air, to allow them to oxidize

• In a vacuum, to enhance their properties

The reaction of alkali metals with chlorine can be described by which of the following general equations?

• 2M + Cl2 → 2MCl

• M + Cl2 → MCl2

• 2M + Cl2 → M2Cl

• M + Cl → MCl

What products are formed when alkali metals react with water? Give a general equation and an example.

• Alkali metal hydroxide and hydrogen gas

• Alkali metal oxide and water

• Alkali metal chloride and hydrogen gas

• Alkali metal carbonate and carbon dioxide

Compounds formed from alkali metals are typically:

• ionic with high melting points and good electrical conductivity

• covalent with low melting points and poor electrical conductivity

• metallic with variable melting points and moderate electrical conductivity

• amphoteric with neutral pH and no electrical conductivity

The reactivity of Group 1 elements changes as you go down the group.

• It increases

• It decreases

• It remains the same

• It fluctuates

The main elements of Group 7 are known as what?

• Halogens

• Noble Gases

• Alkali Metals

• Transition Metals

Group 7 elements have similar chemical and physical properties because:

• they have the same number of valence electrons.

• they are all metals.

• they have different atomic numbers.

• they are all gases at room temperature.