# Grade 10 Questions On Atomic Structure

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Grade 10 questions on atomic structure.

• 1.

### What is the atomic number for hydrogen?

• A.

1

• B.

2

• C.

3

• D.

4

• E.

5

A. 1
Explanation
The atomic number is the larger number associated with the element. In this case, it's 1.

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• 2.

### What is the chemical symbol for calcium?

• A.

Cl

• B.

C

• C.

Ca

• D.

Cu

• E.

Cr

C. Ca
Explanation
The chemical symbol for calcium is Ca.

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• 3.

### How many neutrons are in nickel?

• A.

3

• B.

8

• C.

31

• D.

28

• E.

24

C. 31
Explanation
Atomic mass - atomic # = # of neutrons

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• 4.

### How many protons are in nickel?

• A.

3

• B.

8

• C.

31

• D.

28

• E.

24

D. 28
Explanation
Atomic # = # of protons

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• 5.

### What is the atomic mass of phosphorus?

• A.

15

• B.

31

• C.

2

• D.

18

• E.

16

B. 31
Explanation
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.

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• 6.

### Which element has a mass of 65?

Zinc
zinc
Zink
zink
Explanation
Zinc is the correct answer because it is the only element mentioned in the options that has a mass of 65. The other options, "zinc," "Zink," and "zink," are just variations in capitalization and spelling of the correct answer, but they all refer to the same element.

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• 7.

### What type of element is Potassium?

• A.

Metal

• B.

Non-metal

• C.

Metalloid

• D.

Noble Gas

• E.

Halogen

A. Metal
Explanation
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.

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• 8.

### The Lewis Dot diagram for Carbon would have how many dots (valence electrons)?

• A.

2

• B.

3

• C.

4

• D.

5

• E.

6

C. 4
Explanation
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.

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• 9.

### What is Californium's atomic number?

• A.

96

• B.

97

• C.

98

• D.

99

• E.

100

C. 98
Explanation
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.

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• 10.

### What is Californium's atomic mass?

• A.

247

• B.

247

• C.

251

• D.

252

• E.

257

C. 251
Explanation
Californium's atomic mass is 251.

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• 11.

### How many protons does Californium have?

• A.

96

• B.

97

• C.

99

• D.

98

• E.

100

D. 98
Explanation
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.

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• 12.

### How many electrons does Californium have?

• A.

96

• B.

92

• C.

97

• D.

98

• E.

99

D. 98
Explanation
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.

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• 13.

### How many netrons does Californium have?

• A.

110

• B.

153

• C.

98

• D.

251

• E.

1

B. 153
Explanation
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.

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• 14.

### How many neutrons does Be have?

• A.

4

• B.

5

• C.

6

• D.

7

• E.

9

B. 5
Explanation
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.

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• 15.

### What is the formula for calculating the number of neutrons in an element?

• A.

Atomic mass - atomic number

• B.

Atomic number - atomic mass

• C.

Atomic weight - atomic mass

• D.

Atomic mass - atomic weight

• E.

# of protons - # of electrons

A. Atomic mass - atomic number
Explanation
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.

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• Current Version
• Nov 14, 2023
Quiz Edited by
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• Jan 29, 2009
Quiz Created by
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