____ number of elements are present in the noble family.

Which element is found in Group 17 and is the most reactive non-metal?

1. Chlorine
2. Argon
3. Fluorine
4. Magnesium

Which noble gas has 18 protons?

___________are elements that receive or gain electrons to produce negative ions.

1. Non-metals
2. Metals
3. Metalloids
4. Noble gases

Non-metals are present on which side of the periodic table?

1. Left side
2. Right side
3. Middle
4. Down

Noble gases are mostly found ____________.

1. In the atmosphere
2. Underwater in the ocean
3. Deep inside the Earth's crust
4. In outer space

Balloons are filled with a noble gas called _______________ that lets them float in the air.

1. Neon
2. Hydrogen
3. Oxygen
4. Helium

Gases that exhibit stability and low reaction rates are called ______________.

1. Halogen gases
2. Noble gases
3. Boron gases
4. Carbon gases

Which of these groupings of elements could have the characteristic of brittle?

1. Metal
2. Non-metal
3. Metalloid
4. None of the above

The element which has the property of being a good conductor of electricity and a bad conductor of heat is

1. Graphite
2. Carbon
3. Iodine
4. Chlorine

Noble gases are inert because

1. They are highly reactive
2. They are unreactive
3. They are noble
4. They have 8 electrons in their outermost energy level

_______ acts as a lubricant in making pencils.

1. Graphite
2. Diamond
3. Carbon
4. Phosphorous

Which of the following is a solid inert element?

1. Argon
2. Neon
3. Iodine
4. Helium

Which of these is not the property of noble gases?

1. Colorless
2. Odorless
3. Flammable
4. Gas at room temperature

_________ is used in dressing wounds.

1. Chlorine
2. Antiseptic
3. Tincture iodine
4. Aluminum

Iodine test is used to check the presence of _________.

1. Fat
2. protein
3. Both A and B
4. Carbohydrates