Xx Unit 2 Sem Ex Review

Front

Which element is located in period 4 and group 5?

Back

Vanadium (V)

Front

What is the speed of light?

Back

3.0x10^8 m/s

Front

Which of the following elements is most likely a poor conductor of electricity?

Back

Phosphorus (P)

Front

What is the energy of a photon with wavelength of 688 nm?

Back

2.90 x 10^-19 J

Front

What is the energy of a photon with frequency 5.95 x 10^14 Hz?

Back

3.94 x 10^-19 J

Front

Define 'photon'.

Back

A photon is a quantum of electromagnetic radiation, which carries energy proportional to its frequency.

Front

What is the formula to calculate the energy of a photon?

Back

E = h * f, where E is energy, h is Planck's constant (6.626 x 10^-34 Js), and f is frequency.

Front

What is Planck's constant?

Back

Planck's constant is a fundamental constant used in quantum mechanics, valued at approximately 6.626 x 10^-34 Js.

Front

What is the relationship between wavelength and frequency?

Back

Wavelength (λ) and frequency (f) are inversely related: c = λ * f, where c is the speed of light.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.