Periodic table

How are the elemnts arranged in the periodic table?

• In order of increasing density

• In order of increasing shininess

• In order of increasing atomic mass

• In order of increasing melting point

What does the term "periodic" mean in the periodic table ?

• Occurs almost never

• Occurs once or twice

• Occurs or repeats at regular intervals

• Occurs once

How is the trend of reactivity of metals down the group?

• It decreases down the group

• It stays constant

• Depends on the size of metal atom

• It increases down the group

Why do you think the reactivity of non-metals decreases down the group?

• Because they attract neutrons

• Because the elements lose the power of pulling valence electrons to center

• Because their atoms gain more protons

• Because they react with noble gases

Below are acts about non-metals excet _____

• They exist as diatomic molecules

• Most of them exist as gaseous molecules

• They are solid in nature

• They are in right side of periodic table

Why are members of Group I called Alkali metals?

• The names were given by Mendeleev himself

• Because they react with as Alkali gas

• Because when dissolved in water, they form alkali solution.

• Because when dissolved in alkali they form acid

Aluminium is a metal member of Group 13. As a metal it has many properties. Below is one of the properties:

• It is liquid in nature

• It is shiny

• It can be dissolved in water

• It is found in air as gas

The periodic table is divided into the following excpet:

• Information on Protons

• Groups

• Periods

• Information on the Atoms

Chlorine is element number 17, when it gains one electron it gets a stable electronic configuration similar to that of _______

• Fluorine

• Hellium

• Neon

• Beryllium

How do we call elements that exist as both metals and non-metals? ____