Chemistry Worksheet - Nuclear Decay and Electrolysis

The decay of Bi-210 is considered a transmutation because:

• it results in the formation of a different element.

• it does not change the number of protons in the nucleus.

• it only changes the number of neutrons in the nucleus.

• it leaves the element unchanged.

Tags

NGSS.HS-PS1-8

Determine the fraction of an original sample of Rn-222 that remains unchanged after 7.646 days.

• 1/2 (half-life principle: after one half-life, half the original sample remains unchanged)

• 1/4 (quarter of the original sample remains)

• 1/8 (one eighth of the original sample remains)

• 2/3 (two thirds of the original sample remains)

Tags

NGSS.HS-PS1-8

Complete the nuclear equation below for the decay of Po-218 by writing a notation for the missing product.

• 4/2 He (alpha particle)

• 0/-1 e (beta particle)

• 1/0 n (neutron)

• 0/0 γ (gamma ray)

Tags

NGSS.HS-PS1-8

Determine the number of neutrons in an atom of Pb-214.

• 132 (214 - 82 = 132)

• 214 (214 - 0 = 214)

• 82 (214 - 132 = 82)

• 126 (214 - 88 = 126)

The pH value of the solution after the cell operates for 20 minutes is compared to the pH value before the battery is connected.

• The pH value decreases after the cell operates for 20 minutes.

• The pH value increases after the cell operates for 20 minutes.

• The pH value remains the same after the cell operates for 20 minutes.

• The pH value fluctuates randomly after the cell operates for 20 minutes.

State the oxidation number of oxygen in the aqueous product.

• -2

• 0

• +1

• -1

The aqueous solution in the cell conducts an electric current because:

• it contains ions that are free to move and carry charge.

• it contains only neutral molecules that do not move.

• it is a pure liquid with no charged particles.

• it contains ions that are fixed in place and cannot move.

Tags

NGSS.HS-PS2-4

8. This cell is an electrolytic cell because, in terms of energy:

• Electrical energy is supplied to drive a non-spontaneous reaction.

• It produces electrical energy from a spontaneous reaction.

• It operates without any external energy source.

• It only involves the transfer of heat energy.

Tags

NGSS.HS-PS2-5

Select the structural formula that represents an isomer of the product with the same functional group.

• 

• 

• 

• 

The boiling point of diethyl ether at standard pressure is lower than the boiling point of water at standard pressure because:

• diethyl ether has weaker intermolecular forces than water

• diethyl ether has stronger intermolecular forces than water

• water has weaker intermolecular forces than diethyl ether

• both have the same strength of intermolecular forces