test 1

elements have luster, good conductors of heat and electricity and malleable and ductile

• Metals

• Nonmetals

• Noble gases

The only metal that exists in a liquid state

• mercury

• bromine

• hydrogen

elements that may be solids, liquids or gases and having no luster

• metals

• inert gases

• nonmetals

the only nonmetals that exist in a liquid state

• oxygen

• bromine

• carbon

the only nonmetal element that conducts electricity

• oxygen

• nitrogen

• carbon

the number of known elements up till now is

• 92 elements

• 118 elements

• 100 elements

Elements are classified according to their properties into

• metals and nonmetals

• solid and liquid

• compounds and elements

the number of electrons in the outermost shell of a magnesium atom is

a nitrogen atom contains ....................... electrons

Sodium, magnesium, and aluminium can form ..................... ion