Chemistry Flashcards
High melting point and boiling point, conducts electricity when molten, solid is hard and brittle
Ionic Bonding
Very high melting point, non conductor of electricity, very hard and brittle
Covalent network
Most have high melting points, good conductors of electricity when solid or liquid most are hard
Metallic bonding
Low/intermediate melting and boiling points, does not conduct electricity, most are soft
Covalent molecular
Metal atoms lose electrons to become
Positively charged
Non metal atoms gain electrons to become
Negatively charged
The 2 groups which are the MOST reactive
Alkali metals and the Halogens
The least reactive group
Noble Gases
What do all elements in the same group (across) have in common
The same number of electrons in their outer shell, thus the same valency
What do all elements in the same period (down) have in common
Same number of electron shells. (Same as the period number)
What happens to the mass of elements as their atomic numbers increase
Mass increases
What happens to the reactivity of Alkali metals as you go down the group
Reactivity increases
What happens to the reacticity of Halogens as you go down the group
Reactivity decreases down the group
Which of the groups would be LEAST likely to find as pure elements in nature
Alkali metals - They are highly reactive and form compounds quickly
Hydrochloric Acid
HCl
