In Niels Bohr's model of the atom, electrons are said to occupy specific energy levels or orbits around the nucleus. What is the primary feature of these orbits?
Anonymous Quiz
28%
Electrons can exist anywhere around the nucleus.
59%
Electrons can only occupy certain allowed energy levels.
9%
Electrons are stationary and do not move.
4%
Electrons can only be found in the nucleus.
What is the electron configuration for magnesium(Mg) metal? Z = 12
Anonymous Quiz
4%
1s²2s²2p⁶3s¹
77%
1s²2s²2p⁶3s²
4%
1s²2s²2p⁵3s¹
15%
1s²2s²2p⁶3s²
❤5
What is the core electron configuration of calcium (Ca) metal? Z = 20.
Anonymous Quiz
15%
[Ne]4s²
72%
[Ar]4s²
7%
[Ar] 4s¹
7%
[Ar] 4s² 3d¹
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[Biol 12] Evolution (2003-2011) Answers (1).pdf
205.9 KB
[Biol 12] Evolution (2003-2011) Answers (1)
Physics_G_12_100_Questions_and_Answers_from_Unit_4_Electromagnetism.pdf
10.3 MB
Physics G-12 100 Questions and Answers from Unit 4 Electromagnetism
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When a body exerts a force on a second body, the second body exerts a force on the frist body which is equal in magnitude but opposite in direction. This law is known as _______________?
Anonymous Quiz
5%
Newton's 1st law
13%
Newton's 2nd law
80%
Newton's 3rd law
2%
Not exist in any law
If 140 cm³ of CH4 diffuse into air in 72 seconds, how long will it take 210 cm³ of SO2 to diffuse under the same conditions?
Anonymous Quiz
18%
72 seconds
54%
144 seconds
20%
60 seconds
8%
156 seconds
🥰1
What volume of oxygen will react with carbon monoxide to produce 20L of carbon dioxide at STP?
Anonymous Quiz
26%
100L
26%
10ML
44%
10L
5%
100ML
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Which particle among the following has the highest charge to mass ratio?
Anonymous Quiz
12%
Neutron
12%
Nucleus
46%
Electron
31%
Proton
Which of the following statement is incorrect about vectors?
Anonymous Quiz
13%
They have both magnitude and direction.
5%
Arrows are used to represent vectors.
69%
All fundamental physical quantities are vectors.
13%
The length of the arrow can tell us the magnitude of the vector.
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A force of 500N is acting on a body upward. What is the resultant of the force?
Anonymous Quiz
19%
0 N
50%
500 N
30%
-500 N
2%
250 N
What is the angle between the two vectors A = 3i - j and B = i - 2j?
Anonymous Quiz
11%
60°
20%
57°
28%
90°
41%
45°
How will two vectors give a maximum resultant?
Anonymous Quiz
57%
When they act in the same direction.
15%
When they act in opposite direction.
26%
When they are perpendicular to each other.
2%
Can not be determined.
What should be the value of t so that the vectors A = (2, 5) and B = (10, t) become perpendicular to each other.
Anonymous Quiz
22%
4
53%
-4
13%
-3
12%
-17
What should be the other component of a 500 N force, if one of its component is 300 N ?
Anonymous Quiz
55%
200 N
5%
600 N
18%
400 N
22%
800 N
Given that: A = 2i + 5j and B = i - 3j, then what is A + B?
Anonymous Quiz
5%
i + 4j
13%
3i - 2j
73%
3i + 2j
9%
3i - 8j
❤5🤔1
If 0.8i + k j is a unit vector, then what is (are) the value (s) of k?
Anonymous Quiz
21%
± 0.8
61%
± 0.6
14%
0.6
4%
- 0.6
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