Classification of Elements

_____ group contains the member of

halogen family.

• 17th

• 15th

• 18th

• 16th

The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in

• 4 group

• 2 group

• 14 group

• 18 group

What is the other name for group 18^th elements?

• Noble gases

• Alkali metals

• Alkaline Earth metals

• Halogens

In Mendeleev's Periodic Table how many periods and groups are present?

• 6 periods, 8 groups

• 6 groups, 8 periods

• 7 periods, 8 groups

• 7 groups, 8 periods

Newland classified ________ elements.

• 63

• 118

• 65

• 56

Mendeleef classified _______elements

• 56

• 63

• 65

• 36

Which one of the following is a Dobereiner Triad?

• Na,Ca,Al

• Li,Na,Ca

• Li,Na,K

• F,Cl,Br

The atomic number tells you what?

• number of electrons

• number of protons

• number of neutrons

• both electrons and protons in an atom.

Shiny and good conductors of electricity:

• Nonmetal

• Lightning

• Metal

• Semi-metal

Which of the following elements is classified as a metalloid?

• Silicon

• Oxygen

• Iron

• Gold