Periodic Table

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Q1. Which group in the periodic table contains the noble gases? (2023)

Solution:

Noble gases are found in Group 18 of the periodic table, characterized by their lack of reactivity due to having a full valence shell.

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Q2. What is the valency of Oxygen? (2021)

Solution:

Oxygen has a valency of 2, as it needs two electrons to complete its outer shell.

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Q3. Which element is represented by the symbol 'Fe'? (2019)

Solution:

The symbol 'Fe' stands for Iron, derived from its Latin name 'Ferrum'.

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Q4. What is the atomic number of Carbon? (2021)

Solution:

The atomic number of Carbon is 6, which is the number of protons in its nucleus.

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Q5. Which of the following elements is a noble gas? (2021) 2021

Solution:

Neon is a noble gas, which is characterized by its lack of reactivity.

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Q6. What is the atomic mass of Oxygen approximately? (2019)

Solution:

The atomic mass of Oxygen is approximately 16 u.

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Q7. What is the period number of Argon? (2020)

Solution:

Argon is located in Period 3 of the periodic table.

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Q8. What is the common oxidation state of Alkaline earth metals? (2014) 2014

Solution:

Alkaline earth metals commonly exhibit a +2 oxidation state.

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Q9. Which element has the atomic number 11? (2022)

Solution:

Sodium has the atomic number 11, indicating it has 11 protons.

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Q10. Which element has the highest atomic number in the first 20 elements? (2020)

Solution:

Calcium has the highest atomic number (20) among the first 20 elements.