Physical Science Quiz 4a

What is the primary information that the concept of atomic number provides, which was crucial for the synthesis of new elements in the laboratory?

• The number of protons in the nucleus of an atom.

• The total number of electrons in an atom.

• The mass of an atom's nucleus.

• The number of neutrons in the nucleus of an atom.

Who is credited with the creation of the periodic table of elements, which organizes elements based on their properties and atomic mass?

• Isaac Newton

• Albert Einstein

• Dmitri Mendeleev

• Marie Curie

The current and modern periodic table, which is organized based on atomic number and forms the basis for our understanding of chemical elements, was primarily developed by:

• A) Antoine Lavoisier

• B) Dmitri Mendeleev

• C) Marie Curie

• D) Henry Moseley

Which scientist is credited with the discovery of radium and polonium, two radioactive elements, and conducted pioneering research on radioactivity?

• A) Dmitri Mendeleev

• B) Albert Einstein

• C) Marie Curie

• D) Antoine Lavoisier

In contemporary scientific research, which method is commonly used for the creation of new elements?

• A) Chemical synthesis in laboratories

• B) Biological processes in living organisms

• C) Nuclear reactions in particle accelerators

• D) Solar fusion in stars

What do the dots in a Lewis dot structure represent?

• Protons in the nucleus of an atom.

• Electrons in the outermost energy level of an atom.

• Neutrons in the nucleus of an atom.

• Electrons in the inner energy levels of an atom.

What are valence electrons in an atom?

• Electrons located in the innermost energy level of an atom.

• Electrons located in the nucleus of an atom.

• Electrons located in the outermost energy level of an atom.

• Electrons that have gained energy and moved to a higher energy level.

Based on the image below, how many valence electrons does Tin have?

• 9

• 4

• 1

• 7

Determine the Lewis structure of HCl.

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For the element Oxygen, which of the following Lewis dot structure would be considered incorrect?

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