18. The description of the structure of the atom is called the ___. ATOMIC MODEL

19. In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A ______ bond is found in a water molecule. COVALENT BOND

20. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by a(n) ___. I NEED HELP

21. One way the modern atomic model differs from Thomson’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 ___. I NEED HELP

22. If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current _______. ATOMIC THEORY

23. The number of protons in the nucleus of an atom is its ___. ATOMIC NUMBER

20. Ionic Bond

21. Orbit

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20. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by a(n) "saltshaker attraction" because we all know how much sodium loves to season things.

21. One way the modern atomic model differs from Thomson’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 "electron vacation spot." They like to have their own space, you know!

I hope that helps! If you have any more questions, feel free to ask!

20. Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by a(n) ___ IONIC BOND.

To get the answer, you can recognize that sodium, being a metal, tends to lose electrons, while chlorine, being a nonmetal, tends to gain electrons. In the case of sodium chloride, sodium loses one electron to become a positively charged sodium ion (Na+), while chlorine gains one electron to become a negatively charged chloride ion (Cl-). These two ions are then attracted to each other due to their opposite charges, resulting in the formation of an ionic bond.

21. One way the modern atomic model differs from Thomson’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 or ORBITAL.

To get the answer, you can compare Thomson's atomic model (the "plum pudding" model) with the modern atomic model. Thomson's model suggested that electrons were scattered throughout an atom's positive matter (like chocolate chips in cookie dough), while the modern atomic model states that electrons occupy specific energy levels or orbitals outside the nucleus.

22. If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current ___ ATOMIC MODEL or THEORY.

To get the answer, you can understand that scientific theories, including the atomic theory, are not fixed but subject to change as new evidence and information emerge. If new information about the behavior of atoms is discovered and verified, then scientists might need to revise and update the current atomic model or theory to incorporate the new findings.

23. The number of protons in the nucleus of an atom is its ___ ATOMIC NUMBER.

To get the answer, you can recall that the atomic number of an atom corresponds to the number of protons in its nucleus. It serves as a unique identifier for elements on the periodic table.

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