Question

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

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

(10^{9} 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 = 10

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 = 10^{3} 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

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