If an atom has an atomic number of 11 and a mass number of 22.99, then the number of electrons that the neutral atom will have will be...
  • 22.99
  • 23
  • 12
  • 11
An ION is an atom that has either...
  • lost an electron
  • gained an electron
  • become charged
  • all of the above are correct
The elements in the blue area of the periodic table are...
  • metals
  • gases
  • non-metals
  • solids
The elements in the red area of the periodic table are...
  • metals
  • gases
  • non-metals
  • solids
Which of the following IS NOT A PROPERTY of metals?
  • Is ductile
  • Is malleable
  • Is brittle
  • Is a good conductor
Which of the following IS NOT A PROPERTY of zinc?
  • Is ductile
  • Is malleable
  • Is brittle
  • Is a good conductor
Which of the following IS NOT A PROPERTY of phosphorus?
  • Cannot be polished
  • Has a dull appearance
  • Is brittle
  • Is a good conductor
The correct number and type of each atom in the formula above is
  • 1 x hydrogen, 2 x sulfur, 4 x oxygen
  • 2 x hydrogen, 1 x sulfur, 4 x oxygen
  • 2 x hydrogen, 4 x SO
  • none of the above are correct
Which of the statements about this formula is INCORRECT?
  • It contains 5 hydrogen atoms
  • It contains 2 carbon atoms
  • It contains 1 oxygen atom
  • It contains 6 hydrogen atoms
Which of the following is an example of the formation of a mixture?
  • Rust forming on an iron nail.
  • Sugar crystals dissolving in water.
  • Sodium and chlorine forming table salt.
  • Hydrogen and oxygen reacting to produce oxygen.
Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?
  • Oxygen is more reactive than air.
  • Oxygen has a higher density than air.
  • Oxygen goes under a phase change, whereas air is always a gas.
  • Oxygen contains only one substance, but air contains several substances.
Which of the following is an example of of a container filled with a pure substance rather than with a mixture?
  • A tire filled with air.
  • A jar filled with salt water.
  • A balloon filled with helium.
  • A glass filled with chocolate milk.
When electricity passes through water, hydrogen and oxygen are produced. Which table correctly labels the compounds and elements involved in the process?
  • Water-->CompoundHydrogen-->CompoundOxygen--->Element
  • Water-->CompoundHydrogen--->ElementOxygen--->Compound
  • Water--->CompoundHydrogen--->ElementOxygen--->Element
The chemical equation shown below represents a reaction that produces fuel for certain cars.CO + H2O------->CO2 + H2Which substance in this equation is classified as an element?
  • CO
  • O2
  • CO2
  • H2
Which changes MUST happen for elements to become a compound?
  • elements are heated
  • a gas becomes a liquid
  • elements dissolve in water
  • chemical bonds form between atoms.
Water (H2O), is not found on the periodic table because water is a...
  • atom
  • liquid
  • mixture
  • compound
Which of the following explains why saltwater is considered a mixture?
  • It is composed of one element.
  • It is composed of one compound.
  • It is composed of two or more substances and has new chemical properties.
  • It is composed of two or more substances and retains their own chemical properties.
Oxygen and iron combine chemically to form rust. Rust is classified as which of the following?
  • an atom.
  • an element.
  • a compound.
  • a mixture.
When the elements copper (Cu) and oxygen (O) chemically combine, they form...
  • an ion
  • a gas
  • a compound
  • a mixture
This image is a model of...
  • an element
  • a compound
  • a homogenous mixture
  • a heterogeneous mixture
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