18 Questions
Given a particle made up of 29 protons, 35 neutrons, and 27 electrons, what is the overall charge of the particle?
+2
Which type of matter is a compound classified as?
A pure substance
In what form does hydrogen naturally exist on Earth?
Diatomic gas
If five students measured the length of a desk and obtained measurements slightly above 50.0 cm, what conclusion can be drawn?
The measurements have high precision
Which substance is an example of a crystalline solid?
Table salt
What is kinetic energy primarily associated with?
Energy of motion
What is the classification of a chlorine atom after it gains an electron?
A chloride anion
Which of the following sequences correctly lists substances from most dense to least dense?
Liquid water, water vapor, ice
What is true about isotopes of the same element?
They have different electronic compositions
How many electrons are found in a hydrogen cation?
0
Which property can be used to distinguish between the components of a mixture?
All of the above
According to Bohr’s model of the atom, what determines an atom’s chemical properties?
Number of electrons in the outer shell
What is the significance of the outer orbitals with the highest energy electrons in an atom?
They determine the chemical behavior of the atom
Which statement accurately describes the electron configuration of hydrogen and oxygen in H2O molecules in ice?
Oxygen attracts electrons more strongly than hydrogen
Why do noble gases exhibit unreactive behavior?
They have complete valence electron energy levels
In Bohr's model of the atom, what is the main drawback or limitation compared to modern quantum mechanics?
Bohr's model does not account for electron movement in orbitals
What factor contributes significantly to the boiling point of water at different pressures?
The arrangement of hydrogen bonds between water molecules
When preparing a liquid solution in a Florence flask, why does the round shape contribute to even heating?
The round shape minimizes heat loss due to convection currents
Test your knowledge on the classification of atoms and the order of density of substances. Questions include identifying the classification of a chlorine atom after gaining an electron and arranging substances from most dense to least dense.
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