Study

Science-2-U Chemistry

  •   0%
  •  0     0     0

      Back   Restart
  • Scientists, like chemists, must use the ______________ to measure and weigh so that they can share their findings with the rest of the world.
    Scientists, like chemists, must use the metric system to measure and weigh so that they can share their findings with the rest of the world.
  • What is the name of the ordered arrangement of the chemical elements into rows and columns?
    The Periodic Table
  • What is CHEMISTRY? The study of _______________________
    the scientific study of ELEMENTS and the MOLECULES they make with other elements.
  • Which measurement is more accurate, millimeters or meters?
    millimeters
  • Is vinegar an acid or a base?
    Acid
  • Who invented the Periodic Table of Elements?
    In 1869, Russian chemist Dmitri Mendeleev created the framework that became the modern periodic table.
  • On the pH scale, which number represents neutrals?
    On the pH scale, number 7 represents neutrals.
  • What is an atom?
    An atom is the smallest particle of any substance.
  • The liquid that passes through a filter is called the __________________.
    The liquid that passes through the filter is called the FILTRATE.
  • Name one indication that a chemical reaction has occurred.
    color change, temperature change, new substance is formed
  • What is phenolphthalein?
    Phenolphthalein is a chemical compound which turns pink/red in an alkaline and clear in an acid. It is used in titrations.
  • A person who studies and works with chemicals is known as a ___________.
    A person who studies and works with chemicals is known as a chemist.
  • when molecules meet with other molecules they usually change each other. This is known as a ______________________.
    when molecules meet with other molecules they usually change each other. This is known as a CHEMICAL REACTION.
  • What is the name of the scientific equipment pictured here?
    Erlenmeyer flask
  • What is a precipitate in chemistry?
    A precipitate is a solid that forms from a chemical or physical reaction when 2 or more solutions are combined.
  • On the pH scale, which numbers represent acids?
    Numbers less than 7 represent acids.
  • What is the atomic number of Hydrogen?
    Hydogen's atomic number is 1
  • When you mix baking soda and vinegar you get a chemical reaction. What new substance is formed (the bubbles)?
    Carbon dioxide
  • Atoms are made from even tinier pieces known as subatomic particles. What are these 3 things called?
    Protons, neutrons and electrons.
  • Is ammonia an acid or a base?
    Base
  • A group of different types of elements stuck together is called a ________________
    A group of different types of elements stuck together is called a MOLECULE.
  • What is an element?
    An element is a certain kind of ATOM. A substance that is made up of only 1 type of atom.
  • On the pH scale, which numbers represent bases?
    On the pH scale, the numbers higher than 7 represent bases.
  • When performing a filtration, what is the name of the substance you collect on the filter paper?
    Residue
    • Your experience on this site will be improved by allowing cookies.