Use the following words to fill in the blanks.
Atomic number
Ionic bond
Atomic mass
Law of conservation of mass
Endothermic reaction
Electron
Covalent bond
Product
Isotope
Proton
Carbon cycle
Energy level, orbital, or shell
Atomic model
Atomic theory
1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the _______. (electrons?)
2.The description of the structure of the atom is called the _______. (atomic model)
3. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A _____ bond is found in a water molecule. (convalent)
4. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by a(n) ______. (ionic bond)
5. One way the modern atomic model differs from Thompson's atomic model is that electrons are no longer scattered throughout an atom's positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a specific ____. (energy level, orbital, or shell)
6. If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current _____. (atomic theory)
7. The number of protons in the nucleus of an atom is its _____. (atomic number)
I agree with all of your answers. For #5 I would stick with energy level.
1. Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of the electron. This discovery showed that atoms can indeed be divided into smaller particles.
To find the number of electrons in an atom, you can refer to the periodic table. The atomic number of an element corresponds to the number of protons in its nucleus, and in a neutral atom, the number of electrons is equal to the number of protons. Therefore, the atomic number indicates the number of electrons in an atom.
2. The description of the structure of the atom is called the atomic model. There have been various atomic models proposed throughout history, each representing different understanding and advancements in our knowledge about atoms and their structure.
To learn about different atomic models, you can study the historical development of atomic theory and the contributions of scientists like John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, and others. Exploring their experiments and theories will provide insights into the evolution of our understanding of the atomic model.
3. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A covalent bond is found in a water molecule. Covalent bonds occur when atoms share electrons to achieve a more stable electron configuration.
To understand covalent bonds further, you can study the concept of electron sharing and how it leads to the formation of molecules. Understanding how atoms interact with each other in terms of electron sharing and achieving a stable state will provide insight into covalent bonding.
4. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by an ionic bond. Ionic bonds occur when there is a transfer of electrons from one atom to another, resulting in the formation of ions that are attracted to each other due to opposite charges.
To understand ionic bonding, it is essential to learn about the concept of atoms gaining or losing electrons to achieve a stable electron configuration. Exploring the electronegativity of elements and the resulting formation of ions will provide a deeper understanding of ionic bonding.
5. One way the modern atomic model differs from Thompson's atomic model is that electrons are no longer scattered throughout an atom's positive matter like chocolate chips in cookie dough. Instead, each electron is outside of the nucleus occupying a specific energy level, orbital, or shell. Electrons are arranged in these energy levels based on their energy and distance from the nucleus.
To understand the concept of energy levels or shells, you can explore the Bohr model or the quantum mechanical model of the atom. These models depict electrons occupying discrete energy levels or regions around the nucleus. Understanding electron configuration and the arrangement of electrons in different energy levels will help in comprehending the concept of energy levels, orbitals, or shells.
6. If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current atomic theory. Atomic theory is a scientific explanation that describes the behavior and properties of atoms based on experimental evidence and observations.
To learn more about atomic theory, you can study its historical development and the contributions of scientists like John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, and others. Understanding the scientific method and how theories evolve based on new evidence will provide insights into the dynamic and evolving nature of atomic theory.
7. The number of protons in the nucleus of an atom is its atomic number. The atomic number uniquely identifies an element, as each element has a distinct number of protons.
To find the atomic number of an element, you can refer to the periodic table. The atomic number is usually listed above or below the symbol of the element. Counting the number of protons will give you the atomic number.