(Question)
Answer the following question given this paragraph: In the Bohr model, the atom is viewed as a densely packed nucleus comprised of neutrons and protons that is surrounded by electrons at fixed distances, which correspond to specific energy levels. However, the quantum model showed that the distances between electrons and the nucleus are not really fixed. Due to their wave-like nature, we cannot pinpoint the exact location of an electron that is in motion, but we can determine the probability that a given electron will be in a particular region in three-dimensional space. Schrdinger's equations are used to determine the position of a specific electron with respect to a nearby nucleus. The region in space in which an electron is most likely to be found is referred to as an orbital . Q: Which atomic model shows that the distances of electrons from the nucleus is not a fixed value? Choices: - the electron model - the distance model - the equivocation model - the quantum model A:
(Answer)
the quantum model

(Question)
Answer the following question given this paragraph: It is estimated that 100 trillion bacteria live in the gut. This is more than the human cells that make up you. It has also been estimated that there are more bacteria in your mouth than people on the planet. There are over 7 billion people on the planet. Q: An estimated 100 trillion of these live in the gut of an average person? Choices: - viruses - pathogens - algae - bacteria A:
(Answer)
bacteria

(Question)
Answer the following question given this paragraph: A solution is a homogeneous mixture with tiny particles. An example is salt water. The particles of a solution are too small to reflect light. As a result, you cannot see them. That's why salt water looks the same as pure water. The particles of solutions are also too small to settle or be filtered out of the mixture. Q: A homogeneous mixture with tiny particles in it is known as what? Choices: - element - plasmid - structure - solution A:
(Answer)
solution