Neon is from……………….(10Ne)
Nobel gases
Metals
Non-metals
All previous answers
……………. the bond results from sharing electrons is
Metallic bond
Ionic bond
Covalent bond
Pole bond
…………. There is triple covalent bond in molecule of
Oxygen
Hydrogen
Chlorine
Nitrogen
……………. All the following have ionic bond except
H2O
NaCl
MgO
CaO
……….. Number of electrons in the outermost level of metals may be
3
5
6
7
Number of energy levels in oxygen ion is…………than that in oxygen atom (8O)
equal
more
Less
None of the previous
When a non-metal atom is changed into ion, the number of ……………is greater.
neutrons
protons
mass
electrons
? Which is correct about metals
Bad conductor of heat
Have 4,5 or 6 electrons in outermost shell
All are malleable and ductile
All are bad conductors of electricity
…………… During formation of Sodium chloride, chlorine atom
Gains 1 electron from sodium atom
Gives 1 electron to sodium atom
Gives 2 electrons to sodium atom
Gains 2 electrons from sodium atom
…………. All the following have metallic luster except
16S
19K
3Li
4Be
………………. The odd word is
graphite
nitrogen
sulfur
oxygen
The number of…………..in the outermost level determines the type of element
Nobel gase have……………..in the outermost level.
Less than 4 electrons
8 electrons
More than 4 electrons
Exactly 4 electrons
………………….. (Li+) symbol means that it
Lost one proton
Gained one electron
lost one electron
Gained one proton