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Questions and Answers
What is the basis of the tabular arrangement of all the chemical elements in the periodic table?
What is the basis of the tabular arrangement of all the chemical elements in the periodic table?
- Atomic radius
- Atomic mass
- Atomic number (correct)
- Valence electrons
What does the modern periodic law, put forward by Henry Moseley, state?
What does the modern periodic law, put forward by Henry Moseley, state?
- The properties of elements are periodic functions of their atomic masses
- The properties of elements are periodic functions of their atomic numbers (correct)
- The properties of elements are periodic functions of their valence electrons
- The properties of elements are periodic functions of their atomic radii
What does the number on the very top of each element's block in the periodic table represent?
What does the number on the very top of each element's block in the periodic table represent?
- Number of protons (correct)
- Valence electrons
- Atomic mass number
- Number of neutrons
Why are the elements arranged in vertical groups in the periodic table?
Why are the elements arranged in vertical groups in the periodic table?
What does the number in the bottom of each element's block in the periodic table represent?
What does the number in the bottom of each element's block in the periodic table represent?
What are the horizontal rows called in the periodic table?
What are the horizontal rows called in the periodic table?
Which group of elements is known for their variable oxidation states, ability to form colored compounds, and often serving as catalysts in chemical reactions?
Which group of elements is known for their variable oxidation states, ability to form colored compounds, and often serving as catalysts in chemical reactions?
Which element is used in medical implants and devices due to its biocompatibility and resistance to corrosion?
Which element is used in medical implants and devices due to its biocompatibility and resistance to corrosion?
Which group of elements is found in Group 1 of the periodic table and is known for its high reactivity, low ionization energies, and good conductors of heat and electricity?
Which group of elements is found in Group 1 of the periodic table and is known for its high reactivity, low ionization energies, and good conductors of heat and electricity?
What is the most common flame test color for sodium?
What is the most common flame test color for sodium?
Which element is crucial in the formation of hemoglobin in the human body?
Which element is crucial in the formation of hemoglobin in the human body?
What are the general properties of alkali metals?
What are the general properties of alkali metals?
Which group of elements has larger atomic sizes compared to alkali metals but is less reactive than alkali metals?
Which group of elements has larger atomic sizes compared to alkali metals but is less reactive than alkali metals?
Which of the following elements is found in Group 2 of the periodic table and is known for its metallic nature, high melting and boiling points, and higher density?
Which of the following elements is found in Group 2 of the periodic table and is known for its metallic nature, high melting and boiling points, and higher density?
Which group of elements is known for being stored under oil or inert gases due to their vigorous reactivity with air and moisture?
Which group of elements is known for being stored under oil or inert gases due to their vigorous reactivity with air and moisture?
Which group of elements has the unique characteristic of being in-between metals and nonmetals?
Which group of elements has the unique characteristic of being in-between metals and nonmetals?
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