Year 9 Chemical Reactions / Nuclear Decay Review

Which of the following is ALPHA decay?

• High frequency, short wavelength electromagnetic radiation is released. No change in particles.

• A neutron turns into a proton and an electron and this electron is emitted

• An atom emits two protons and two neutrons from its nucleus.

An atom's __________ describes how many protons an atom has

• Reaction Rate

• Atomic Number

• Chemical Symbol

• Mass Number

What is the MASS number of this element?

• 3

• 7

• Li

_______ is the breakdown of an unstable atomic nucleus resulting in the release of energy and/or matter.

• Nuclear decay

• Nuclear energy

Is this equation balanced?

NaOH + HCl --> NaCl + H20

• YES (Balanced)

• NO (Unbalanced)

According to the Law of Conservation of Energy, energy cannot be _________ or ____________. 

• destroyed, destroyed
• created, saved
• created, destroyed
• lost, found

Balance this equation
_N₂ + _H₂ --> _NH₃

• 1,2,3
• 1,3,2
• 1,1,2
• 2,1,1

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

Which side of a chemical equation is the product side?

• Left (before the arrow)

• Right (after the arrow)