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8F The periodic table review
By Katie Bruce
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Last updated 5 months ago
14 questions
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Question 1
1.
What is the relationship between the melting point and freezing point of a substance?
They are always different.
They occur at the same temperature.
One is higher than the other.
Question 2
2.
If water melts at 0°C, at what temperature does it freeze?
-1°C
0°C
100°C
Question 3
3.
Explain why the melting and freezing points of a substance are the same.
Question 4
4.
At what temperature does iron freeze if its melting point is 1538°C?
1538°C
1000°C
153°C
Question 5
5.
Describe what happens to particles at the freezing point of a substance.
Question 6
6.
What happens to the reactivity of halogens as you move down Group 7?
Reactivity increases.
Reactivity decreases.
Reactivity stays the same.
Question 7
7.
Why does the reactivity of halogens decrease as you go down the group?
Question 8
8.
Which halogen is the most reactive: fluorine, chlorine, or iodine?
Fluorine
Chlorine
Iodine
Question 9
9.
Predict what would happen if chlorine was added to a solution of potassium iodide.
No reaction
Iodine would be displaced
Chlorine would be displaced
Question 10
10.
What did Mendeleev do when elements didn’t seem to fit in his periodic table?
A) He removed them.
B) He left gaps for undiscovered elements.
C) He ignored them.
Question 11
11.
Why did Mendeleev leave gaps in his periodic table?
A) He couldn't find the elements.
B) He predicted the existence of elements that hadn't been discovered yet.
C) He thought the periodic table was complete.
Question 12
12.
What did Mendeleev predict about the elements that would fill the gaps in his periodic table?
A) Their atomic masses and properties.
B) Their chemical symbols.
C) Their location on Earth.
Question 13
13.
Why were Mendeleev’s predictions important for his acceptance by other scientists?
A) The elements were discovered with the properties he predicted.
B) He knew all elements in existence.
C) He was the only one studying the periodic table.
Question 14
14.
What event led to Mendeleev being credited by scientists for his periodic table?
A) He arranged the elements by atomic number.
B) The discovery of new elements with properties matching his predictions.
C) His ability to predict chemical reactions.