Question

1.The wavelength of a particular color of red light is 665 nm.

The energy of this wavelength of light is kJ/photon.


(10⁹ nm = 1 m)

2. A local FM radio station broadcasts at an energy of 6.15×10^-29 kJ/photon.

Calculate the frequency at which it is broadcasting.
Frequency = MHz

(1 MHz = 10⁶ sec ^-1)

3. A local AM radio station broadcasts at a frequency of 712 KHz.

Calculate the energy of the frequency at which it is broadcasting.
Energy = kJ/photon

(1 KHz = 10³ sec ^-1)

4. What is the name of the element that is in group 2A and period 5?

What is the name of the element that is in group 7A and period 6?

What is the name of the element that is in group 7B and period 4?

What is the name of the element that is in group 1A and period 1?

  

5. Which of the following are main group elements.
Choose all that apply.

Zn

Ga

Co

Na

6.     Give the symbol for an element that is

1) a halogen.

2) an alkali metal.

3) a noble gas.

4) an alkaline earth metal.

Answer 1