first 20 elements atomic numbers

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Last updated 2:52 AM on 12/1/24
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20 Terms

1
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What is the atomic number of Hydrogen (H)?

1

2
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The atomic number of Helium (He) is __________.

2

3
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What element has the atomic number 3?

Lithium (Li)

4
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Beryllium (Be) has an atomic number of __________.

4

5
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What is the atomic number for Boron (B)?

5

6
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Carbon (C) has an atomic number of __________.

6

7
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What element corresponds to the atomic number 7?

Nitrogen (N)

8
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Oxygen (O) has an atomic number of __________.

8

9
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What is the atomic number of Fluorine (F)?

9

10
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The atomic number for Neon (Ne) is __________.

10

11
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What element has the atomic number 11?

Sodium (Na)

12
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Magnesium (Mg) has an atomic number of __________.

12

13
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What is the atomic number of Aluminum (Al)?

13

14
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Silicon (Si) has an atomic number of __________.

14

15
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What element corresponds to the atomic number 15?

Phosphorus (P)

16
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Sulfur (S) has an atomic number of __________.

16

17
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What is the atomic number of Chlorine (Cl)?

17

18
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Argon (Ar) has an atomic number of __________.

18

19
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What element has the atomic number 19?

Potassium (K)

20
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Calcium (Ca) has an atomic number of __________.

20