Scientific Method
Atomic Chemistry
Protons, neutrons, electrons
Bonds
100
Inference or Observation? You hear the fire alarm going off.
Observation! You could infer that there is a fire in the school.
100
This is a Bohr model of which element? http://www.chemicalelements.com/bohr/b0009.gif
Flourine.
100
How many protons does Gold have?
79.
100
What bond is a bond between two ions?
Ionic bond.
200
What are the first and last steps of the scientific method?
First - Make an observation. Last - Analyze data and form a conclusion.
200
What do the columns of the periodic table tell us?
Groups. Number of valence electrons.
200
How many neutrons does Argon have?
22.
200
What kind of a bond involves atoms sharing electrons?
Covalent.
300
Which step of the scientific method is this? Because the heavy objects hit the ground at the same time as the light objects, Galileo knew his hypothesis was correct.
Analyze data and form a conclusion.
300
Which type of elements form negative ions?
Non-metals.
300
3 part answer!
What is the charge of a proton?
What is the charge of an electron?
What is the charge of a neutron?
Proton - positive +
Electron - negative -
Neutron - neutral
300
What is the correct name for the ionic compound NaCl? Write it out using words.
Sodium Chloride.
400
On which axis of a graph do we draw the dependent variable?
On the Y axis.
400
Which type of elements form positive ions?
Metals.
400
How many valence electrons does Chlorine have?
7.
400
Which of the following is NOT an ionic compound? NaF NO2 Na2O Fe2O3
NO2
500
Which variable does the scientist deliberately test?
The independent variable.
500
How many valence electrons does a the ion Mg 2+ have?
10.
500
Draw a bohr model of a Helium atom.
http://www.chemicalelements.com/bohr/b0002.gif
500
You have a compound that is highly conductive and has a very high melting point. Is this compound likely to be covalent or ionic?
Ionic.
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