Question
5. Why are sodium (Na) and potassium (K) in the same group on the periodic table?(1 point)
Responses
They have similar atomic weights.
They have similar atomic weights.
They are both hard and brittle.
They are both hard and brittle.
They have similar reactivity.
They have similar reactivity.
They are both colorless.
They are both colorless.
Question 6
6. A student cuts some fabric into two pieces. Is this change physical or chemical and why?(1 point)
Responses
It is a physical change because there is no reaction.
It is a physical change because there is no reaction.
It is a chemical change because the size changes.
It is a chemical change because the size changes.
It is a physical change because the process is reversible.
It is a physical change because the process is reversible.
It is a chemical change because there is no phase change.
It is a chemical change because there is no phase change.
Question 7
7. How are chemical changes different from physical changes?(1 point)
Responses
They are reversible.
They are reversible.
They form new substances.
They form new substances.
They include shifts in the phase of matter.
They include shifts in the phase of matter.
They involve heat.
Responses
They have similar atomic weights.
They have similar atomic weights.
They are both hard and brittle.
They are both hard and brittle.
They have similar reactivity.
They have similar reactivity.
They are both colorless.
They are both colorless.
Question 6
6. A student cuts some fabric into two pieces. Is this change physical or chemical and why?(1 point)
Responses
It is a physical change because there is no reaction.
It is a physical change because there is no reaction.
It is a chemical change because the size changes.
It is a chemical change because the size changes.
It is a physical change because the process is reversible.
It is a physical change because the process is reversible.
It is a chemical change because there is no phase change.
It is a chemical change because there is no phase change.
Question 7
7. How are chemical changes different from physical changes?(1 point)
Responses
They are reversible.
They are reversible.
They form new substances.
They form new substances.
They include shifts in the phase of matter.
They include shifts in the phase of matter.
They involve heat.
Answers
GPT-4o mini
Here are the answers to your questions:
**Question 5**: Why are sodium (Na) and potassium (K) in the same group on the periodic table?
**Answer**: They have similar reactivity.
**Question 6**: A student cuts some fabric into two pieces. Is this change physical or chemical and why?
**Answer**: It is a physical change because there is no reaction.
**Question 7**: How are chemical changes different from physical changes?
**Answer**: They form new substances.
**Question 5**: Why are sodium (Na) and potassium (K) in the same group on the periodic table?
**Answer**: They have similar reactivity.
**Question 6**: A student cuts some fabric into two pieces. Is this change physical or chemical and why?
**Answer**: It is a physical change because there is no reaction.
**Question 7**: How are chemical changes different from physical changes?
**Answer**: They form new substances.