Mid-One /lesson one-1
The number of known elements up till now is ............. elements.
92
118
121
211
All of the following are metals except
iron
oxygen
copper
sodium The element which has atomic number 12 is considered from
metals
nonmetals
noble gas
no correct answer
All of the following elements can form positive ions except
sodium
chloride
magnesium
aluminium
When an atom of an element loses one electron or more, it changes into
a nigative ion
a positive ion
a neutral atom
no correct answer
the scientific term :
The only metal that exists in a liquid state
Positive ion
Nobel gas
Mercury
Non metals
Negative ion
the scientific term
Elements that may be solids, liquids or gases and having no luster, bad conductors of heat and electricity and containing more than (4) electrons in their outer electron shells.
Positive ion
Nobel gas
Mercury
Nonmetals
Negative ion
the scientific term
An atom of an element that gives or gains an electron or more during the chemical reaction.
Positive ion
Nobel gas
Non metals
Mercury
ion
scientific term
An atom of an element that neither loses nor gains any electrons.
Positive ion
Nobel gas
Non metals
Mercury
ion
right or wrong
.All metals are solids
right
wrong
right or wrong
. Sodium, magnesium and aluminium can form positive ionsright
wrong
right or wrong
. Nonmetals have more than four electrons in their outer shells.
ا
right
wrong
right or wrong
. Ionic bond arises between nonmeta
right
wrong
.right or wrong The molecules of gases are diatomic molecules. right
wrong
