Atomic Theory Quiz: Structure of Atoms and Molecules

<p>The representation of valence electrons and bonding in molecules (B)</p> Signup and view all the answers

<p>It introduced the idea of quantum energy levels in an atom (A)</p> Signup and view all the answers

<p>A molecule can consist of the same or different elements, while a compound consists only of different elements (B)</p> Signup and view all the answers

<p>Protons and neutrons are located in the nucleus of an atom (A)</p> Signup and view all the answers

<p>Proposed the atomic theory (B)</p> Signup and view all the answers

<p>Developing the Bohr model of the atom (A)</p> Signup and view all the answers

<p>A type of molecule that consists of two or more different elements bonded together (C)</p> Signup and view all the answers

<p>A compound consists of two or more different elements bonded together, while a molecule can be of the same element or different elements (C)</p> Signup and view all the answers

<p>The representation of valence electrons and bonding in molecules (C)</p> Signup and view all the answers

<p>Our understanding has evolved from basic ideas to complex modern quantum theory (D)</p> Signup and view all the answers

<p>In the nucleus of an atom (C)</p> Signup and view all the answers

<p>Rutherford (D)</p> Signup and view all the answers

<p>Protons and neutrons are located in orbit around the nucleus (B)</p> Signup and view all the answers

A substance formed when two or more different elements combine in a fixed ratio, resulting in properties distinct from its individual components.

Rutherford discovered the nucleus of an atom—a small, dense, positively charged center where most of the atom's mass resides.

J.J. Thomson discovered the electron, a negatively charged subatomic particle.

A Lewis Diagram focuses on the arrangement of electrons in a molecule, showing how atoms share electrons to form covalent bonds.

The Bohr model introduced the idea of energy levels and electron jumps around the nucleus—electrons can only exist in specific energy levels.

A molecule can be made up of atoms of the same element (e.g., O2), while a compound is made up of atoms from different elements (e.g., H2O).

Dalton proposed that elements consist of indivisible particles called atoms, and that compounds are formed by combining atoms in whole number ratios.

The atomic model has evolved from the plum pudding model to the nuclear model, incorporating new discoveries like subatomic particles and a refined understanding of atomic structure.

Protons and neutrons reside in the nucleus of an atom, while electrons orbit around the nucleus.

Rutherford proposed that the nucleus is small, dense, positively charged, and surrounded by electrons in a mostly empty space.

A covalent bond is formed when two atoms share electrons in a molecule, resulting in a stable arrangement.

Subatomic refers to particles that are smaller than an atom, such as protons, neutrons, and electrons.

The Bohr model introduced specific energy levels for electrons, suggesting that electrons can only occupy certain orbits around the nucleus.

Protons have a positive charge, neutrons have no charge (they are neutral), and electrons have a negative charge.

Dalton's theory stated that atoms are the basic building blocks of elements, that elements are made of identical atoms, and that compounds are formed when atoms combine in fixed ratios.

A compound has properties different from its individual elements because the atoms are chemically combined to form a new substance with a unique structure and characteristics.

In a compound, the elements are always present in a fixed, unchanging ratio by weight.