9X4 beta decay

9X4 beta decay

In this lesson you will

• review basics about atomic structure

• review isotopes

• review alpha decay

• learn about beta decay

Multiple Choice

which particle has a positive charge?

• proton

• neutron

• electron

Multiple Choice

which particle has a negative charge?

• proton

• neutron

• electron

Multiple Choice

Pb-210 is an isotope of lead.

Isotopes of lead...

• all have the same number of protons

• all have the same number of neutrons

• all have the same mass number

ISOTOPES are versions of the same atom with different numbers of neutrons

Multiple Choice

What is an alpha particle made of?

• an electron and a proton

• two protons and a neutron

• two protons and two neutrons

• two protons and two electrons

You will need a periodic table for the next few questions

Multiple Choice

Pb-210 decays by alpha decay.

What does it become?

• Pb-208

• Po-209

• Hg-206

• Pb-206

Multiple Choice

What is the mass number of an alpha particle?

• 1

• 2

• 3

• 4

Multiple Choice

Ra-226 decays by alpha decay.

What does it become?

• Rn-86

• Rn-222

• Ra-222

• Pb-207

Alpha decay is not the only decay type possible.

C-14 can decay to become N-14

Look at this on the periodic table

This type if decay is called BETA decay.

The symbol for beta decay is β

Multiple Choice

When C-14 becomes N-14, its atomic number

• has increased

• has stayed the same

• has decreased

Multiple Choice

When C-14 becomes N-14, what has happened to the neutron number?

• increased

• stayed the same

• decreased

That's the end of the online bit.

Now we will write decay equations for beta decay.