Scientific Method and Elements & Compounds

Make an observation, ask a question, form a testable hypothesis, test hypothesis with an experiment, analyze data.

Several factors, such as temperature, concentration gradient, and the medium through which diffusion occurs.

A testable prediction about the relationship between variables.

<p>variable</p> Signup and view all the answers

<p>The condition that remains constant and unchanged to provide a baseline for comparison.</p> Signup and view all the answers

<p>The independent variable is manipulated, while the dependent variable is measured.</p> Signup and view all the answers

<p>A substance that cannot be broken down by chemical reactions.</p> Signup and view all the answers

<p>A substance made of two or more elements chemically bonded in a fixed ratio.</p> Signup and view all the answers

<p>Atoms of the same element that have the same number of protons but different numbers of neutrons.</p> Signup and view all the answers

<p>The process by which unstable isotopes lose subatomic particles.</p> Signup and view all the answers

<p>5,730 years.</p> Signup and view all the answers

<p>Electron</p> Signup and view all the answers

<p>They determine the chemical behavior of an atom.</p> Signup and view all the answers

<p>The number of valence electrons in the outermost shell</p> Signup and view all the answers

<p>They are chemically inert.</p> Signup and view all the answers

<p>Second shell</p> Signup and view all the answers

<p>The atom is likely to participate in chemical reactions.</p> Signup and view all the answers

<p>Neon and Helium</p> Signup and view all the answers

<p>There may be variables we are unaware of.</p> Signup and view all the answers

<p>Correlation does not control for all variables.</p> Signup and view all the answers

<p>A compound has properties that differ from those of its elements.</p> Signup and view all the answers

<p>92</p> Signup and view all the answers

<p>The fixed ratio of sodium to chlorine in sodium chloride.</p> Signup and view all the answers

<p>The number of protons in their nuclei</p> Signup and view all the answers

<p>It is approximated by summing protons and neutrons</p> Signup and view all the answers

<p>They have different numbers of neutrons</p> Signup and view all the answers

<p>They are unstable and can emit radiation.</p> Signup and view all the answers

<p>Neutrons and protons in the nucleus</p> Signup and view all the answers

<p>25</p> Signup and view all the answers

<p>A neutron decays into a proton.</p> Signup and view all the answers

<p>Diagnostic imaging with radioactive tracers.</p> Signup and view all the answers

<p>Carbon-12 and Carbon-13</p> Signup and view all the answers

<p>No electrical charge</p> Signup and view all the answers

<p>By measuring the ratio of isotopes and determining the number of half-lives that have passed.</p> Signup and view all the answers

<p>The time it takes for half of a radioactive sample to decay.</p> Signup and view all the answers

<p>Electrons.</p> Signup and view all the answers

<p>4.5 billion years.</p> Signup and view all the answers

<p>They vary in energy based on their location and structure.</p> Signup and view all the answers

<p>It is the energy that matter has because of its location or structure.</p> Signup and view all the answers

<p>To introduce the topic and explain the importance of the research</p> Signup and view all the answers

<p>The conclusions section proposes explanations based on data trends</p> Signup and view all the answers

<p>It should make predictions that can be measured through experiments</p> Signup and view all the answers

<p>It is the outcome that is measured to assess the effect of the independent variable</p> Signup and view all the answers

<p>There is a strong relationship, but it does not imply causation</p> Signup and view all the answers

<p>To provide a baseline for comparison against the test conditions</p> Signup and view all the answers

<p>The testable hypothesis</p> Signup and view all the answers

<p>To isolate the effect of the independent variable on the dependent variable</p> Signup and view all the answers

<p>They determine the chemical behavior of an atom.</p> Signup and view all the answers

<p>It has a complete valence shell.</p> Signup and view all the answers

<p>Oxygen, with a partially filled outer shell.</p> Signup and view all the answers

<p>Different electron shells correspond to different potential energy levels for electrons.</p> Signup and view all the answers

<p>They are inclined to form chemical bonds with other elements.</p> Signup and view all the answers

<p>They can only be supported by data.</p> Signup and view all the answers

<p>Causation cannot be definitively established.</p> Signup and view all the answers

<p>A compound consists of elements in a fixed ratio.</p> Signup and view all the answers

<p>A significant association exists, but causation is not confirmed.</p> Signup and view all the answers

<p>Multiple hypotheses can be generated for the same observations.</p> Signup and view all the answers

<p>It helps to establish a baseline for comparison.</p> Signup and view all the answers

<p>To ensure the independent variable does not influence the dependent variable.</p> Signup and view all the answers

<p>Results support or refute the hypothesis but cannot provide definitive proof.</p> Signup and view all the answers

<p>To outline the procedures and techniques used in the experiment.</p> Signup and view all the answers

<p>There is a strong relationship, but not necessarily causation.</p> Signup and view all the answers

<p>It allows for a direct measure of the dependent variable.</p> Signup and view all the answers

<p>It transforms into a proton.</p> Signup and view all the answers

<p>A review of what is known and the importance of the research question.</p> Signup and view all the answers

<p>Half-life</p> Signup and view all the answers

<p>It proposes implications and interpretations of the results.</p> Signup and view all the answers

<p>They behave like non-radioactive isotopes in biological systems.</p> Signup and view all the answers

<p>Parent and daughter isotopes</p> Signup and view all the answers

<p>Carbon-14 has a significantly shorter half-life.</p> Signup and view all the answers

<p>Potential energy</p> Signup and view all the answers

<p>Electrons</p> Signup and view all the answers

<p>Each has a unique half-life.</p> Signup and view all the answers

<p>Different isotopes exist for each element.</p> Signup and view all the answers

<p>Different numbers depending on the species.</p> Signup and view all the answers

<p>Carbon-12 is the most abundant isotope.</p> Signup and view all the answers

<p>They are responsible for the atomic number.</p> Signup and view all the answers

<p>Isotopes can differ in their electron configuration.</p> Signup and view all the answers

<p>Humans require more essential elements than plants.</p> Signup and view all the answers

<p>Electrons</p> Signup and view all the answers

<p>Carbon-14 has a different neutron count.</p> Signup and view all the answers