Exploring the Elements

What is the atomic number of krypton?

• 36

• 12

• 54

• 18

What is the primary use of copper in electrical applications?

• Electrical wiring and conductors.

• Plumbing and piping systems.

• Jewelry and decorative items.

• Construction materials for buildings.

Which gas makes up about 78% of the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Hydrogen

What is the symbol for krypton on the periodic table?

• Kr

• Kr2

• Kx

• K

What is the melting point of copper in degrees Celsius?

• 1200

• 900

• 1050

• 1084.62

What is the molecular formula for nitrogen gas?

• N4

• N2

• N3

• N

In what year was krypton discovered?

• 1898

• 1901

• 1885

• 1895

What is the conductivity property of copper?

• Copper has low electrical conductivity.

• Copper is a poor conductor of electricity.

• Copper has no conductivity properties.

• Copper has high electrical conductivity.

What role does nitrogen play in the formation of amino acids?

• Nitrogen is a byproduct of amino acid synthesis.

• Nitrogen is essential for the formation of amino acids as it is a key component of the amino group.

• Nitrogen is only involved in the energy production of cells.

• Nitrogen is not necessary for amino acid formation.

What is the state of krypton at room temperature?

• Gas

• Solid

• Liquid

• Plasma