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15 Cards in this Set

  • Front
  • Back
What particle in an atom's nucleus has no charge?
In the electron cloud model of the atom, what does the electron cloud contain?
electrons and a lot of empty space
A scientist knows that a pure substance has six protons in the nucleus of each of its atoms. What can the scientist conclude?
The pure substance can be identified as a specific element.
In a lab, a student observes a sample of an element. It is brittle and a poor conductor of heat, and it cannot be hammered into sheets. What is it?
The element zirconium is a metal. Where will zirconium be found on the periodic table?
on the left side of the table
The measure of the amount of solute dissolved in a solvent is called what?
When you look at the formula for water, you can tell that it is what?
a compound
JJ Thomson's plum pudding model of the atom shows what?
It shows that the atom has negatively charged particles called electrons.
A student has a mixture of small pieces of iron fillings and sand. How can the student separate the mixture?
The student can use a magnet to separate the mixture.
How can the solubility of a solution be decreased?
You can cool the solvent.
Be able to look at a periodic table and tell how many protons an element has in its nucleus.
Use a periodic table and practice. The atomic number, located right above the symbol, shows the number of protons.
Be able to look at a periodic table and tell which elements will have similar chemical properties.
Look at the COLUMNS in the periodic table.Elements in the same column react similarly with other substances.
Which elements touch the zig zag line in the periodic table?
A student performs a pH test on liquid soap and finds that its pH is between 11 and 12. The liquid soap is what?
An artist needs a chemical compound that will react strongly with a metal in order to form a new compound. What substance should she pick?
an acid