radioactivity g9

Two isotopes of the same element have

• the same number of protons but different numbers of neutrons

• the same number of protons but different numbers of electrons

• the same number of neutrons but different numbers of protons

• the same number of electrons but different numbers of protons

What are the three types of radiation?

• Alpha, beta, and gamma

• Delta, epsilon, and zeta

• Theta, iota, and kappa

• Lambda, mu, and nu

Answer explanation

The three types of radiation are alpha, beta, and gamma. Alpha radiation consists of helium nuclei, beta radiation involves electrons or positrons, and gamma radiation is high-energy electromagnetic waves.

Gamma radiation is:

• 2 protons

• A high speed electron

• A wave

• 2 protons and 2 neutrons

Beta radiation is:

• 2 protons

• A high speed electron

• A wave

• 2 protons and 2 neutrons

An alpha particle consists of:

• 2 protons

• A high speed electron

• A wave

• 2 protons and 2 neutrons

Radiation is emitted from:

• all atoms

• most atoms

• unstable atoms

• stable atoms

How many types of radiation are there?

• 3

• 9

• 2

• 4

1.What do you call the centre of an atom?

• electron

• nucleus

• proton

• neutron

_______________ is the process by which unstable atoms emit radiation until they become stable.

• Radiation
• Chemical Reaction
• Radioactive Decay
• Isotopes

The international measuring unit of radiation absorbed by human body

• Ohm

• Joule

• Sievert

• Watt