Questions asked by Eva S.

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• How do you convert SI units?
  
• What are the SI units?
  
• How many base SI units are there?
  
• What SI units are used to measure power?
  
• What SI units are used to measure density?
  
• What SI units are used to measure volume?
  
• Why are SI units helpful?
  
• What are rounding and significant figures?
  
• How can I round significant figures when multiplying?
  
• How can I round significant figures in Excel?
  
• Why should I use significant figures in chemistry?
  
• How does scientific notation work?
  
• How can I multiply and divide numbers written in scientific notation?
  
• How can I add and subtract numbers written in scientific notation?
  
• How does scientific notation with decimals work?
  
• What does scientific notation look like?
  
• What does scientific notation mean?
  
• What is scientific notation used for?
  
• Why is scientific notation important?
  
• How can accuracy of a measurement be improved?
  
• How can percent error be reduced?
  
• How can precision be improved?
  
• How can precision be measured?
  
• What is precision in chemistry?
  
• What percent error is too high?
  
• How can we graph independent and dependent variables?
  
• How many independent variables can an experiment have?
  
• How can we identify dependent variables?
  
• What are dependent variables?
  
• Why does the independent variable go on the x axis?
  
• What is an independent variable in chemistry?
  
• How can I draw graphs in word?
  
• How can I draw graphs in Excel?
  
• Are bar graphs and histograms the same?
  
• What are line graphs?
  
• How do atoms become ions?
  
• Can atoms be subdivided?
  
• Can matter be destroyed?
  
• How do matter and energy interact?
  
• What molecules are diatomic?
  
• What atoms are found in carbohydrates?
  
• What type of atoms tend to form covalent bonds?
  
• What is a neutral atom?
  
• What periodic table elements are radioactive?
  
• How are the elements are organized in the periodic table?
  
• How can the periodic table be used to predict the properties of the elements?
  
• Why is the periodic table a useful tool?
  
• How can elements have different isotopes?
  
• How can elements be broken down?
  
• How can elements properties be predicted?
  
• How can matter be converted into energy?
  
• How does heat affect the phases of matter?
  
• How is energy related to the phases of matter?
  
• How many different phases of matter are there?
  
• What are the properties of matter?
  
• What are the phases of matter?
  
• How do phase changes occur on a molecular level?
  
• How do phase changes work?
  
• How can I calculate phase changes?
  
• What are the phase changes of water?
  
• What phase change of water releases heat?
  
• What type of mixtures can be separated by filtration?
  
• What type of mixtures can be separated by centrifugation?
  
• How do mixtures differ from compounds?
  
• How do mixtures differ from pure substances?
  
• What are the types of methods to separate mixtures?
  
• What are some examples of mixtures?
  
• What is a chemical change?
  
• How can a chemical change be sped up?
  
• How are physical changes different from chemical changes?
  
• Do chemical changes involve energy?
  
• What is a physical change?
  
• Are physical changes reversible?
  
• How does the Bohr model work?
  
• How can I draw Bohr diagrams?
  
• How do electrons fill orbitals?
  
• How do protons determine the properties of an atom?
  
• How many neutrons can an atom have?
  
• What is the atomic structure of carbon?
  
• Why is the number of protons and electrons equal in an atom?
  
• How can the atomic number be determined?
  
• How can the atomic mass of an element be calculated?
  
• How do atomic numbers change in the periodic table?
  
• What is the atomic mass in hydrogen?
  
• What is atomic mass?
  
• What does the atomic number tell us?
  
• How are isotopes of elements formed?
  
• What isotopes are used in nuclear power?
  
• What radioactive isotopes are naturally occurring?
  
• Why do elements share electrons?
  
• Why do elements emit colors when heated?
  
• Why are some isotopes radioactive and others are not?
  
• How are metalloids different from metals?
  
• How many nonmetals are there in the periodic table?
  
• Why are metalloids described as semiconductors?
  
• Why metals are good conductors of electricity?
  
• Why are metals malleable?
  
• What happens to ionic size down a group?
  
• What happens to ionic size across a period?
  
• How does ionic size change?
  
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