Grade 10 Questions On Atomic Structure
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What is the atomic number for hydrogen?
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1
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2
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3
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4
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5
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This quiz tests knowledge on atomic structure, focusing on atomic numbers, symbols, and mass for elements like hydrogen, calcium, nickel, phosphorus, and zinc.
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- 2.
What is the chemical symbol for calcium?
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Cl
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C
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Ca
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Cu
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Cr
Correct Answer
A. CaExplanation
The chemical symbol for calcium is Ca.Rate this question:
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- 3.
How many electrons does Californium have?
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96
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92
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97
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98
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99
Correct Answer
A. 98Explanation
Californium is a chemical element with the atomic number 98, which corresponds to the number of protons in its nucleus. In a neutral atom, the number of electrons is equal to the number of protons. Therefore, Californium has 98 electrons.Rate this question:
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- 4.
How many protons does Californium have?
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96
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97
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99
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98
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100
Correct Answer
A. 98Explanation
Californium is a chemical element with the symbol Cf and atomic number 98. The atomic number represents the number of protons in the nucleus of an atom. Therefore, Californium has 98 protons.Rate this question:
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- 5.
How many protons are in nickel?
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3
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8
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31
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28
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24
Correct Answer
A. 28Explanation
Atomic # = # of protonsRate this question:
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- 6.
What type of element is Potassium?
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Metal
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Non-metal
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Metalloid
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Noble Gas
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Halogen
Correct Answer
A. MetalExplanation
Potassium is a metal because it is a highly reactive alkali metal that belongs to Group 1 of the periodic table. It has a low ionization energy and readily loses its single valence electron to form a positive ion. Metals generally have lustrous appearances, conduct electricity and heat, and are malleable and ductile. Potassium exhibits these characteristics, making it a typical example of a metal.Rate this question:
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- 7.
What is Californium's atomic number?
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96
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97
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98
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99
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100
Correct Answer
A. 98Explanation
Californium's atomic number is 98. The atomic number represents the number of protons in the nucleus of an atom. Since Californium has 98 protons, its atomic number is 98.Rate this question:
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- 8.
What is the formula for calculating the number of neutrons in an element?
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Atomic mass - atomic number
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Atomic number - atomic mass
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Atomic weight - atomic mass
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Atomic mass - atomic weight
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# of protons - # of electrons
Correct Answer
A. Atomic mass - atomic numberExplanation
The formula for calculating the number of neutrons in an element is atomic mass - atomic number. This is because the atomic mass represents the total mass of an atom, which includes both the protons and neutrons. The atomic number represents the number of protons in an atom. By subtracting the atomic number from the atomic mass, we can determine the number of neutrons present in the atom.Rate this question:
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- 9.
What is Californium's atomic mass?
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247
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247
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251
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252
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257
Correct Answer
A. 251Explanation
Californium's atomic mass is 251.Rate this question:
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- 10.
What is the atomic mass of phosphorus?
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15
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31
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2
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18
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16
Correct Answer
A. 31Explanation
The atomic mass of an element is the average mass of the atoms of that element, taking into account the different isotopes and their abundance. Phosphorus has several isotopes, but the most common one is phosphorus-31, which has a mass of 31 atomic mass units. Therefore, the correct answer is 31.Rate this question:
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- 11.
Which element has a mass of 65?
Correct Answer
Zinc, ZnExplanation
Zinc, with the chemical symbol Zn, has an atomic mass of approximately 65.38 atomic mass units (amu).Rate this question:
- 12.
How many netrons does Californium have?
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110
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153
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98
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251
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1
Correct Answer
A. 153Explanation
Californium has 153 neutrons. Neutrons are subatomic particles that have no charge and are found in the nucleus of an atom. The number of neutrons in an atom can vary, but it is determined by subtracting the atomic number (which represents the number of protons) from the atomic mass. In the case of Californium, the atomic mass is 251 and the atomic number is 98, so subtracting 98 from 251 gives us 153 neutrons.Rate this question:
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- 13.
How many neutrons does Be have?
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4
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5
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6
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7
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9
Correct Answer
A. 5Explanation
Beryllium (Be) has an atomic number of 4, which indicates the number of protons in its nucleus. The atomic mass of Be is approximately 9, which is the sum of the protons and neutrons in the nucleus. Therefore, the number of neutrons in Be can be calculated by subtracting the atomic number from the atomic mass. In this case, 9 - 4 = 5, so Be has 5 neutrons.Rate this question:
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- 14.
How many neutrons are in nickel?
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3
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8
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31
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28
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24
Correct Answer
A. 31Explanation
Atomic mass - atomic # = # of neutronsRate this question:
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- 15.
The Lewis Dot diagram for Carbon would have how many dots (valence electrons)?
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2
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3
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4
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5
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6
Correct Answer
A. 4Explanation
The Lewis Dot diagram for carbon would have 4 dots, representing its 4 valence electrons. Carbon is in Group 14 of the periodic table, and elements in this group typically have 4 valence electrons.Rate this question:
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Current Version
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Oct 24, 2024Quiz Edited by
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Jan 29, 2009Quiz Created by
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