Review for finals

Which group is the most reactive?

• Alkai metals

• Alkaline Earth Metals

• Transition metals

• Halogens

• Metalloids

Why are Alkali metals more reactive than others?

• because they are unstable

• Because they only have 1 valence electrons

• Because they have a full set of valence electrons

• Because they are the most stable group

What properties do Alkali Metals have?

• Soft can be cut with a knife, highly reactive and unstable. Group 1

• Group 2, Harder and denser than group 1, reacts easily with water

• Group 3-12, middle chunk of the periodic table, high melting points.

• Staircase, solid at room temp, shares properties with metals and non-metals.

• Group 17, usually found in pairs, burst into flames when near metals.

What properties do Alkaline earth metals have.

• Soft can be cut with a knife, highly reactive and unstable. Group 1

• Group 2, Harder and denser than group 1, reacts easily with water

• Group 3-12, middle chunk of the periodic table, high melting points.

• Staircase, solid at room temp, shares properties with metals and non-metals

• Group 17, usually found in pairs, burst into flames when near metals.

Properties of Transition Metals

• Soft can be cut with a knife, highly reactive and unstable. Group 1

• Group 2, Harder and denser than group 1, reacts easily with water

• Group 3-12, middle chunk of the periodic table, high melting points.

• Staircase, solid at room temp, shares properties with metals and non-metals.

• Group 17, usually found in pairs, burst into flames when near metals. 

Properties of Metalloids

• Soft can be cut with a knife, highly reactive and unstable. Group 1

• Group 2, Harder and denser than group 1, reacts easily with water

• Group 3-12, middle chunk of the periodic table, high melting points.

• Staircase, solid at room temp, shares properties with metals and non-metals.

• Group 17, usually found in pairs, burst into flames when near metals. 

Properties of Hallogens

• Soft can be cut with a knife, highly reactive and unstable. Group 1

• Group 2, Harder and denser than group 1, reacts easily with water

• Group 3-12, middle chunk of the periodic table, high melting points.

• Staircase, solid at room temp, shares properties with metals and non-metals.

• Group 17, usually found in pairs, burst into flames when near metals. 

Where is most of an atom's mass located

• Nucleus

• Protrons

• Electrons

• none of the above

Draw a simple example of an Atom

How much of an atom's mass does the nucleus cover.

• 99.9%

• 89.7%

• 100%

• 0%