Question
A student attempts to arrange four elements (as shown below) in order from most reactive to least reactive.
19 ----- 12 ------------- 6 --------------------- 2
K Mg C ------------------------He
39.10 24.31 12.01------------------4.00
most reactive ----------------> least reactive
9774aa63-6d1a-4fbc-8efd-b9349a42cdf3
Is the arrangement correct, and why (or why not)?
(1 point)
Responses
Yes. An element’s reactivity decreases along with its atomic number.
Yes. An element’s reactivity decreases along with its atomic number.
No. An element’s reactivity decreases from right to left on the periodic table.
No. An element’s reactivity decreases from right to left on the periodic table.
No. An element’s reactivity decreases as atomic mass increases.
No. An element’s reactivity decreases as atomic mass increases.
Yes. An element’s reactivity decreases from left to right on the periodic table.
Yes. An element’s reactivity decreases from left to right on the periodic table.
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19 ----- 12 ------------- 6 --------------------- 2
K Mg C ------------------------He
39.10 24.31 12.01------------------4.00
most reactive ----------------> least reactive
9774aa63-6d1a-4fbc-8efd-b9349a42cdf3
Is the arrangement correct, and why (or why not)?
(1 point)
Responses
Yes. An element’s reactivity decreases along with its atomic number.
Yes. An element’s reactivity decreases along with its atomic number.
No. An element’s reactivity decreases from right to left on the periodic table.
No. An element’s reactivity decreases from right to left on the periodic table.
No. An element’s reactivity decreases as atomic mass increases.
No. An element’s reactivity decreases as atomic mass increases.
Yes. An element’s reactivity decreases from left to right on the periodic table.
Yes. An element’s reactivity decreases from left to right on the periodic table.
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Answers
Answered by
GPT-4o mini
The arrangement of elements in terms of reactivity is not strictly governed by atomic mass or atomic number, but rather by their positions in the periodic table.
In this case, the elements are:
- K (Potassium, atomic number 19)
- Mg (Magnesium, atomic number 12)
- C (Carbon, atomic number 6)
- He (Helium, atomic number 2)
To analyze their reactivities:
1. Potassium (K) is an alkali metal and is highly reactive.
2. Magnesium (Mg) is an alkaline earth metal and is less reactive than potassium but more reactive than carbon.
3. Carbon (C) is a non-metal and is considerably less reactive than both potassium and magnesium.
4. Helium (He) is a noble gas, which are known for being very unreactive.
Thus, the correct order of reactivity from most to least reactive should be:
1. K (Potassium)
2. Mg (Magnesium)
3. C (Carbon)
4. He (Helium)
The statement that aligns with this reasoning is:
**Yes. An element’s reactivity decreases from left to right on the periodic table.**
Therefore, the arrangement you provided (K > Mg > C > He) is indeed correct in terms of reactivity, given the placement of elements in their respective groups on the periodic table.
In this case, the elements are:
- K (Potassium, atomic number 19)
- Mg (Magnesium, atomic number 12)
- C (Carbon, atomic number 6)
- He (Helium, atomic number 2)
To analyze their reactivities:
1. Potassium (K) is an alkali metal and is highly reactive.
2. Magnesium (Mg) is an alkaline earth metal and is less reactive than potassium but more reactive than carbon.
3. Carbon (C) is a non-metal and is considerably less reactive than both potassium and magnesium.
4. Helium (He) is a noble gas, which are known for being very unreactive.
Thus, the correct order of reactivity from most to least reactive should be:
1. K (Potassium)
2. Mg (Magnesium)
3. C (Carbon)
4. He (Helium)
The statement that aligns with this reasoning is:
**Yes. An element’s reactivity decreases from left to right on the periodic table.**
Therefore, the arrangement you provided (K > Mg > C > He) is indeed correct in terms of reactivity, given the placement of elements in their respective groups on the periodic table.