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Questions and Answers
Which statement accurately describes the relationship between protons, neutrons, and electrons in an atom?
Which statement accurately describes the relationship between protons, neutrons, and electrons in an atom?
- The number of protons, neutrons, and electrons are always equal.
- The number of electrons always equals the number of neutrons.
- The number of protons always equals the number of electrons in a neutral atom. (correct)
- The number of protons always equals the number of neutrons.
According to Dalton's atomic theory, which of the following statements is true?
According to Dalton's atomic theory, which of the following statements is true?
- Atoms of different elements can combine in variable whole number ratios.
- All atoms of a given element are identical. (correct)
- Atoms are rearranged in chemical reactions.
- Atoms can be divided into subatomic particles.
What was the key discovery attributed to J.J. Thomson?
What was the key discovery attributed to J.J. Thomson?
- The proton
- The electron (correct)
- The neutron
- The nucleus of the atom
What significant contribution did Rutherford make to the understanding of atomic structure?
What significant contribution did Rutherford make to the understanding of atomic structure?
Which of the following correctly defines 'valence electrons'?
Which of the following correctly defines 'valence electrons'?
Based on its position in the periodic table, is oxygen classified as a metal or a nonmetal?
Based on its position in the periodic table, is oxygen classified as a metal or a nonmetal?
In forming chemical bonds, will an oxygen atom typically gain or lose electrons, and how many?
In forming chemical bonds, will an oxygen atom typically gain or lose electrons, and how many?
For the chemical formula $CH_3CH_2COOH$, how many atoms of each element are present in the molecule?
For the chemical formula $CH_3CH_2COOH$, how many atoms of each element are present in the molecule?
Given the compound $N_3O_4$, what is its correct molecular compound name?
Given the compound $N_3O_4$, what is its correct molecular compound name?
Which of the following is the correct chemical formula for dihydrogen monoxide?
Which of the following is the correct chemical formula for dihydrogen monoxide?
Flashcards
What are electrons?
What are electrons?
Negatively charged particles orbiting the nucleus.
What are Neutrons?
What are Neutrons?
Neutral particles located in the nucleus of an atom.
What are Protons?
What are Protons?
Positively charged particles located in the nucleus of an atom.
Dalton's Atomic Theory
Dalton's Atomic Theory
All matter is composed of indivisible and indestructible atoms.
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Thomson's discovery
Thomson's discovery
The atom is made of smaller particles and discovered the electron.
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Rutherford's Discovery
Rutherford's Discovery
Discovered the atomic nucleus, positively charged with most of the atoms mass.
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What are valence electrons?
What are valence electrons?
Electrons in the outermost shell (valence shell).
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Elements in CH3CH2COOH
Elements in CH3CH2COOH
Carbon, Hydrogen, and Oxygen.
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Is oxygen a metal or nonmetal?
Is oxygen a metal or nonmetal?
Nonmetal.
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Will oxygen gain or lose electrons?
Will oxygen gain or lose electrons?
It gains 2 electrons.
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- An atom consists of electrons, neutrons, and protons.
Bohr Rutherford Diagrams
- The number of protons is the atomic number.
- The number of neutrons is the mass minus the atomic number.
- The number of electrons is the atomic number.
- The first orbital can hold 2 electrons.
- The second orbital can hold 8 electrons.
- The third orbital can hold 8 electrons.
Atomic Theory
- Dalton's atomic theory states all matter is composed of indivisible and indestructible atoms.
- Thomson discovered the atom is made of smaller particles and discovered the electron.
- Rutherford discovered the atomic nucleus, which is positively charged and contains most of the atom's mass.
Valence Electrons
- Valence electrons are all the electrons on the outermost shell (valence shell).
- Oxygen is a nonmetal.
- Oxygen will gain 2 electrons.
Chemical Formula
- A molecule with the chemical formula CH3CH2COOH contains carbon, hydrogen, and oxygen.
- The molecule contains 11 atoms.
Naming Compounds
- NaCl is sodium chloride.
- Lithium oxide is LiO.
- Dihydrogen monoxide is H2O.
- N3O4 is trinitrogen tetroxide.
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