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What is the symbol of NEON ....?

• He

• Ne

• N

• P

Write the electron configuration of potassium

Balloon can float by filling with Helium.

• True

• False

The more _______ across the periodic table, the attraction force _________.

Noble gases do not participate in chemical reactions because their​ (a)   shells are (b)   .

• valence
• full
• inner
• filled with 8 electrons
• filled with 2 electrons
• electron
• innermost

The rows of the periodic table are called

• groups

• periods

• categories

• rows

Oxygen is an example of a

• Non-metal

• Metalloid

• Metal

which one is the correct statement about transition metals?

• it reacts quickly with water

• it is harder than alkali metal

• it has less density than alkali metal

• it floats in water

Alumunium is often used instead of copper in overhead electrical cables. State which statement is NOT an important reason for choosing aluminium for this use.

• is good conductor of electricity

• good conductor of heat

• easy to recycle

• has lower density

What is the name of elements located in Group 18?

• Halogens

• Alkali metals

• Noble Gas

• Actinide