Chemistry Atom Classification and Density Order
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Questions and Answers

Given a particle made up of 29 protons, 35 neutrons, and 27 electrons, what is the overall charge of the particle?

  • -1
  • +2 (correct)
  • 0
  • -2

Which type of matter is a compound classified as?

  • An isotope
  • A pure substance (correct)
  • A mixture
  • A binary element

In what form does hydrogen naturally exist on Earth?

  • Aerosol
  • Ionized gas
  • Crystalline solid
  • Diatomic gas (correct)

If five students measured the length of a desk and obtained measurements slightly above 50.0 cm, what conclusion can be drawn?

<p>The measurements have high precision (A)</p> Signup and view all the answers

Which substance is an example of a crystalline solid?

<p>Table salt (A)</p> Signup and view all the answers

What is kinetic energy primarily associated with?

<p>Energy of motion (C)</p> Signup and view all the answers

What is the classification of a chlorine atom after it gains an electron?

<p>A chloride anion (D)</p> Signup and view all the answers

Which of the following sequences correctly lists substances from most dense to least dense?

<p>Liquid water, water vapor, ice (B)</p> Signup and view all the answers

What is true about isotopes of the same element?

<p>They have different electronic compositions (D)</p> Signup and view all the answers

How many electrons are found in a hydrogen cation?

<p>0 (A)</p> Signup and view all the answers

Which property can be used to distinguish between the components of a mixture?

<p>All of the above (D)</p> Signup and view all the answers

According to Bohr’s model of the atom, what determines an atom’s chemical properties?

<p>Number of electrons in the outer shell (D)</p> Signup and view all the answers

What is the significance of the outer orbitals with the highest energy electrons in an atom?

<p>They determine the chemical behavior of the atom (B)</p> Signup and view all the answers

Which statement accurately describes the electron configuration of hydrogen and oxygen in H2O molecules in ice?

<p>Oxygen attracts electrons more strongly than hydrogen (A)</p> Signup and view all the answers

Why do noble gases exhibit unreactive behavior?

<p>They have complete valence electron energy levels (A)</p> Signup and view all the answers

In Bohr's model of the atom, what is the main drawback or limitation compared to modern quantum mechanics?

<p>Bohr's model does not account for electron movement in orbitals (B)</p> Signup and view all the answers

What factor contributes significantly to the boiling point of water at different pressures?

<p>The arrangement of hydrogen bonds between water molecules (C)</p> Signup and view all the answers

When preparing a liquid solution in a Florence flask, why does the round shape contribute to even heating?

<p>The round shape minimizes heat loss due to convection currents (A)</p> Signup and view all the answers

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